"It’s of no operational or law enforcement benefit to try to block federal authorities from being able to do their job," a senior official said., adding that the tactic has no impact on the migrant flow, and now that when Texas is done receiving them they still are turned over at other locations – therefore adding extra steps to the process.
So it's pretty much performative. Interesting that it's an "senior official" that said that, who maybe wanted to remain unnamed perhaps to avoid an avalanche of death threats, bomb threats, and other vitriolic hate.