The framing of "I don't agree with him" is a problem in a subtle but insidious way. I think the more accurate statement is "I don't agree with an idea he supports"

In politics, religion, whatever, we need a return to discussion of ideas, not the person. You may agree with some and disagree with other ideas.

The world of "Biden bad, Trump good" (or vice versa) will destroy us. Ideas have their own merits, and whether I agree or disagree has little to do with who espouses them.