Social dissonance and alienation is what creates an attractive environment for propaganda to take hold.
Going after specific groups fails to treat the root cause. If we lived in a country where you were free to disagree without being alienated and we wouldn't have nearly as many free-radicals.
"you believe <X>, therefore you're just a typical demonic <Y>" is a great way to turn a radical idea into a radical person. Let ideas be radical so that people don't have to be