No Stupid Questions

And of course all the plans of the US that specifically talked about destroying nations like Iraq and Syria and the invasion of Iraq to do exactly that... All coincidences! Who would be so mean to assume this to be part of larger strategies?

You need to cite sources. This means nothing without a specific source. The US previously had war plans to invade Canada in the event of war with the British Empire. Does that indicate the US is currently trying to destabilize Canada? Such is the nature of geopolitics.

Ahh yes. The Middle Easts own history. Clearly has nothing to do with French, British or US being the colonizing entities... And after all why would the US be interested in dividing a region that is connecting 3 continents and has the mos accessible of the main strategic ressources of the past two centuries.

First of all, the French, British and US never colonized the middle east. They did engage in imperialism in order to control the geopolitical situation from distance after the demise of a previous colonial empire (the Ottomans), but there wasn't any concerted effort to permanently settle or develop colonies in the region. The Middle East has historically been a colonizing region, not a colonized region.

Seriously try to answer your own question. Why would the US be interested in destabilizing the region? So they can deal with more terrorist attacks until the end of time? The success of Middle Eastern countries is not a threat to US hegemony. They are on the payroll just like everyone else, they take US money for their oil and then they turn around and spend that money on manufactured goods and advanced services provided by US corporations. The US always wins as long as there is peace and economic activity is maximized. The US loses when economic activity is reduced, which is why you have the constant interventions in response to political and religious violence and extremism.

The US military is a generally a peacekeeping force, because the US economy is a much more powerful tool for dominating other countries. A military victory only lasts as long as you have troops on the ground, but an economic victory can effectively assimilate an entire society, leaving no trace. The more money that Middle Eastern countries make, the more dependent they become on American goods and services. That's the larger trajectory of the American geopolitical aim, not some childish strategy of "destabilizing" foreign regimes just to get embroiled in hugely expensive wars.

This is such a brainless and oversimplified ideological point of view. If you actually bothered to look into the region, you would clearly see that there's a lot more going on. For example:

1. The Ottoman Empire genocided the Armenians, Greeks, Assyrians and a bunch of other minorities leaving them all to resent the Turks... especially since Turkey still officially denies that any of them even happened
2. Turkey actively oppresses and squashes any attempt for Kurds to maintain their identity, let alone gain independence which leads them to hate the Turks. Just FYI, the Kurdish language, clothing, and culture was banned in Turkey until the 1980s.
3. Turkey illegally occupies half of Cyprus under the pretext of "protecting the Turkish minorities", and both Greece and Cyprus hate them for it because they've broken their treaties and are illegally occupying half of the country
4. Syrians hate Turkey too because it invaded the north and still occupies parts of it
5. The Turks hate Arabs and vice versa because Arabs view the Turks as colonizers turned heathens since they're now secular and allow a bunch of things not allowed in islam, and the Turks view the Arabs as backwards religious fundamentalists who leech of them since there are millions Arab of refugees in Turkey
6. Kuwait hates Iraq because it invaded in the 90s
7. Iran and Iraq don't like each other because of the Iran-Iraq war in the 80s
8. The Iraqi Kurds hate the Arabs because Saddam Hussein genocided them
9. The Sunni and Shia in Iraq hate each other because they're different sects of the same religion, and oh they fought wars over it too
10. Yemen, Iraq, Syria, and Lebanon DESPISE Iran because it actively funds and arms terrorist militias that constantly terrorize them, steal their wealth, and keep their countries into unstable failed states
11. Saudi Arabia and the Gulf countries hate Iran because they're Shia and because they keep threatening their oil exports in the
12. Saudi Arabia hates the Shia in Yemen (the Houthis)
13. The Yemeni people hate Saudi Arabia because of the war they led against them
14. Saudi Arabia, Egypt, the UAE, and Bahrain all severed ties with Qatar in 2017 because it funds terrorist groups inside their borders and because it uses Al Jazeera to pump out propaganda against them. In the case of Saudi Arabia, the mutual hatred got so bad that the royal family actually proposed digging a moat around Qatar to turn it into an island
15. All of the islamic countries in the Middle East hate Israel because it's Jewish
16. Egypt and Turkey don't like each other because Turkey is trying to claim the EEZ of the eastern Mediterranean, some of which is Egypt's
17. Armenia and Azerbaijan hate each other because Azerbaijan denies the Armenian genocide, because on is Christian and the other is muslim, and because of a territorial dispute created by Stalin that they've been fighting over for the past 30 years.
18. Georgia hates Armenia, despite both of them being Christian nations, because they supported Russia's invasion of Georgia in 2008
19. Kuwait hates Palestine because they supported Saddam Hussein's invasion in the 90s, which led Kuwait to expel all 350,000 Palestinians from its territory
20. Jordan hates Palestine because they tried to overthrow the government when they took them in as refugees. This series of events was so bad it became known as black September
21. Syria doesn't like Palestine because they tried to overthrow the government during the Syrian civil war
22. Egypt doesn't like Palestine because they used the Sinai to commit terrorist attacks and they tried to overthrow the government. It got so bad that they joined Israel in their blockade against Gaza
23. Saudi Arabia and the UAE also don't like Palestine because despite all the numerous military, economic, and political aid... their efforts blew up in their faces. The UAE ended up recognizing Israel and Saudi Arabia released a 3 part documentary featuring one of their top diplomats that went through the history of Saudi Arabia's support for Palestine and how the Palestinian leaders were liers, cheaters, and backstabbers
24. Georgia doesn't like Turkey because of its Ottoman past
25. All the caucuses countries hate Russia because of their genocides and imperialism
26. Syria hates Israel because they occupy Golan Heights
27. Lebanon hates Israel because they invaded to stomp out Hezbollah
28. Israel doesn't like any of it's neighbors because they're Arabs and they all supported Palestine
29. Israel also doesn't like Lebanon specifically because of Hezbollah
30. Iran and Israel hate each other because of religious fundamentalism
31. Iranian people, especially the minorities, HATE their government because it's theocratic and their government hates them back because the people are secular
32. Israel doesn't like Jordan, Syria, Egypt, or Lebanon because they invaded it before
33. Christians hate muslims because they've been persecuting them
34. Kurds in Syria don't like the Arabs because they also tried to suppress them
35. Turkey and Israel have a love hate relationship based on Netanyahu's and Erdogan's mood swings.

The list goes on and on. No matter how recent or how far back you go, this region has ALWAYS been unstable, violent, and tyrannical. This because it's in the crossroads of 3 continents like you said, but also because of geography and culture that reinforces the same cycles. Western powers did play a role, but trying to blame all the division, violence, and hatred in that region on the West is just ignorant.