This is a mindset clearly to avoid when building a better community. No group of people has a monopoly of goodness. People are people. We all think ourselves as being on the good side.
Only the people indoctrinated in a fundamentalist worldview perceive all what is on “other side” as always wicked, wrong, sinful, evil. They won’t give their opponents any chance, from the moment they open they mouth. The situation (from the side of the political Left) is described, for example, in the introduction of Nick Cohen’s “What’s Left”
This is how conflicts start and grow. Search yourself and see if you change your moral perception of a statement depending on which “camp” it is coming from. Fight it. We need to build bridges, not to burn them.