A lot of Westerners (Americans included) believe in the myth of the “Perfectibility of Man”
Part of this myth is that man is at his most basic being good (the truth being that at his most basic man is a selfish amoral brut). The other part of the myth is that man’s formative years either make or break him and make him either good or bad. So good childhood experiences make him good and bad childhood experiences make him bad. Either way it is not to his fault or credit his character in the end.
Hence the Left gives us the myth of most Muslims are good people, most criminals can be rehabilitated, call cultures and religions are equally good or bad, multicultural countries are great and Western Civilization is bad because of its history of colonialization.
All of it comes down to the Left’s need to demonize everything that is Western in order to weaken the conservative political parties. The whole notion of conservatives is to ‘conserve’ what is good. Conservatives know that man is wicked at his most basic nature and must be saved by the grace of God and molded by the community of the Church and family.
But the Left is set on burning down the Christian community so if Muslims are anti-west they by that nature must be good. If they are by the Left’s judgment good (weaken the West) they must be permitted to enter the west (America) to make the West less of what it is that makes the West good.
The left is so wrapped up in their own superiority that they don’t realize that it will, literally, be their heads on the ISIS “infidel chopping block.”