All you have to do is think about this reasonably (I know, I know). Undocumented immigrants to the US want to come here so badly that they’re willing to do it outside of the law. They know full well that if they get caught just for that, they’re in a fuckload of trouble. It is clearly in the immediate, direct, and personal best interest of an undocumented immigrant to stay well clear of law enforcement. This means - wait for it - not breaking any other laws.
Undocumented immigrants have a very strong incentive to be absolutely well-behaved.
That’s not how it works in NYC. The city police don’t cooperate with ICE and even make an effort to protect illegal immigrants who have committed crimes from being deported. Simply talking to the cops while being an illegal immigrant isn’t going to get someone detained.
This is all beside the point because the migrants in question aren’t illegal immigrants who have entered the country secretly - the authorities have permitted them to enter and already know who they are. (The authorities are in fact spending a great deal of money on them.)
That’s how it should be though. Everybody is equal under the law, so you shouldn’t punish undocumented immigrants harder than civilians.
A few bad apples spoil the bunch.