I think both you and Bing are right (and so is Howard Johnson). We owe it to ourselves to be the humans we want everyone to be.
It is hard to do. I get Rock's point, it is awful hard to have a reason based conversation with someone who believes that Ukraine is behind 2016 (or is a truther, birther, Holocaust denier, etc). At some point it is on them to believe this stuff.
Politically, it appears impeachment is a problem in Wisconsin. If it is, it probably is a problem in Michigan, Minnesota, Ohio, and Pennsylvania. It is hard to get to get to 270 without some combination of those states. So beyond what is right, politically calling those people names isn't likely to bolster the odds of Trump losing in 2020. We are just internet blokes, i get that. But my guess is message boards, social media, news story replies, all contain the same message; people believing the GOP on impeachment are idiots. It isn't just limited to what we can see here. In that regard, there is a bigger problem.
I've tried having conversations with truthers, birthers, Holocaust deniers. It isn't easy, in fact it is maddeningly frustrating. How do we convert people who refuse to accept the basic facts, who in fact believe the fact the facts are what they are proves some deeper conspiracy? I don't know, I don't know if I've ever seen someone be converted. But that is the problem facing the members of the Democratic Party in the states above. I fear there is not an answer.