When someone disagrees with your ideology, do you allow them to remain human, or do you think of them, and treat them, like a monster, seeking to destroy them for the sin of thinking differently?
Your inability to advance your cause without portraying those who disagree with you as monsters bespeaks the hollowness of your politics, a core of dust. And your future, ashes.
You can't kick the decent out of decent society. Well, you can, but the result is a society that isn't decent anymore.