Well the excellence of the research institutions (as far as CS and STEM in general are concerned) is pretty heavily dependent on immigration... Also remember t

Well the excellence of the research institutions (as far as CS and STEM in general are concerned) is pretty heavily dependent on immigration... Also remember that people aren't completely rational actors, and an action like this carries a lot of symbolic significance for both proponents and opponents. Would you want to stay at a party your friend was rudely kicked out of for no reason just because the booze is good?