Jack, it is quite easy. If you belonged to a race of green people and I belonged to a race of blue people some (not all) politician with want for power is going to say something maybe like the cause of our problems are the green people. We have gone that sort of way for centuries.

Personally and doubly personally as this is the way I want to believe, Christianity should offer a way out of that, not in to that.

Love thy neighbour but most of us fail in some way at some point.