Yeah in less interesting of times I would much more understand where they're coming from. That being said in this specific context it was the quoted person (person A) not understanding why a friend of a friend (B) would no longer speak to them after learning A voted for Trump multiple times.

The subtext I was picking up from the conversation was that B (I assume) is one of many groups being specifically targeted by Trump so they refused to be in the presence of or communicate with someone who's by proxy targeting them. A on the other hand just seems to see it all as politics and doesn't understand what the big deal is about.

In another country or in another time I could understand but given the time and place, their confusion came across to me as showing how oblivious they were to the policies they voted for, who was going to be affected by them, and how negatively they were going to be affected by them.