This isn't a discussion about "open borders" as you framed it, but it is a discussion on whether or not tech workers should have a say if the product of their labour should be used in genocidal actions.
But to answer your first question: there's no need to have a special police-like entity to treat immigrants as guilty until otherwise proved. To tell other country specifically how they should address something would be doing a thing I criticize them for doing.
We're a place where coders share, stay up-to-date and grow their careers.
We strive for transparency and don't collect excess data.