In a lot of cases it's not their fault. They have been indoctrinated since birth by liberal media, liberal teachers unions, and liberal parents who should know better. They have been brainwashed to the point where they cannot even begin to objectively look at their own beliefs. And, they want to be popular and get along with their liberal friends, so they never rock the boat. Some are evil, no doubt, and some do want to destroy the U.S. But I suspect most are just deeply disinformed.