America became great by accepting the best and brightest from around the world. And so long as America is selective in choosing the best and brightest, the incoming diversity of people strengthens the United States. But when we welcome the opposite - those who cannot prove they respect America, and democracy, and intend to assimilate, and earn a living, and play well with others - then we will suffer the consequences of the liberal dream of multiculturalism for its own sake at any cost. Saipov apparently supported ISIS and chose to murder eight New Yorkers at random in an act of Islamic terrorism "to support ISIS" and help destroy the West.