That's hilariously dumb...it goes both ways, obviously. I actually see quite a lot more the other way, where I live, than what was laid out in the original post. Probably because the overwhelming majority of people are GOP, and mostly Trump supporters as well.
Its one of the main reasons we're in such a crappy situation right now as a country, and with our political system.
Your wife's ex friend is way too sensitive, and part of the overall problem. But the vitriol that comes from Trump supporters against Biden voters, is equally as unhinged often times.