Those conversations happen so rarely that it’s not worth even considering that as a possibility until a reply or two has shown that they’re not going to stonewall the conversation.
In person things are one way, but on the anonymous Internet (especially lemmy and reddit) it’s people who are 100% not going to adjust their actively garbage views on things and thus deserve to be treated as the dickheads they too often are
If they don’t like being pre judged based on their political beliefs they should rethink why people have an inherant dislike of them, and maybe change. Or learn to deal with the consequences of having dogshit opinions