That is itself a political belief, though. You cannot in fact have any sort of community without answering political questions about how that community should work. You could say that no external political questions should be discussed in the community, but:
- Enforcing that could cast a bigger shadow over the community than the political arguments did.
- It amounts to saying that the external political situation is acceptable, or at least relatively safe to ignore.
What does it even mean to be "against NATO"? Is it, like, saying "the NATO alliance ought to disband because the terms of the alliance are bad for my country actually"? Is it like "I hope NATO countries lose all their wars"? Or like "NATO is a dangerous thing to exist because it allows an invasion of Country X, which is likely to happen, to result in a global thermonuclear war"?
A bunch of countries could be arming Ukraine without the sort of all-for-one, one-for-all terms of NATO specifically that make it likely to figure prominently in any explanation for why we have all died of nuclear weapons.