There is a very similar dynamic in U.S. politics between extremists on the right and the left, both of whom need each other in order to remain relevant. The big

There is a very similar dynamic in U.S. politics between extremists on the right and the left, both of whom need each other in order to remain relevant. The big difference is that in the U.S. true right wing extremists have been all but eliminated, so radical leftist activists need to invent all kinds of boogymen to replace them. "White supremacists" and their supporters are currently being cast in this role.