This is why self-criticism is important. No one thinks they have abhorrent views, everyone thinks that their own viewpoint is the correct one, so we also need to question and challenge our own perspective to make sure we aren't the one with the awful or ignorant views.

Though I know what you mean, sometimes it just isn't worth a fight with some people and you're better off not wasting time trying to convince someone the sky is blue when they insist it is green because they're just a stubborn asshole. A part of being convincing is being willing to admit when you're wrong, and finding a middle ground point to build off of, but if you can't do that with some people, it isn't worth wasting your time.