I'm minimal contact with him, as little as possible, mostly just at Thanksgiving and occasionally Christmas or another big family holiday. He's a huge conspiracy nut, MAGA guy, microchips in the vaccines, "Am I being detained?" etc. Basically for any topic he's going to find the most asinine position possible and insist that it's the only reasonable one
My theory about those types of people is that they have a very normal need to be important and that need is currently unfulfilled.
And that's how they get drawn into these phantom wars against the boogeyman of the week, like there's some part of them that says, "I am being a hero! I am doing a good thing even though people are against me!"
It probably also explains that the more people that they make uncomfortable the more deeply they get into the rabbit hole.
The negative feedback provides attention, it provides a source of importance to what feels like an unimportant and worthless life.
“If the world hates you, know that it has hated me before it hated you. If you were of the world, the world would love you as its own; but because you are not of the world, but I chose you out of the world, therefore the world hates you." - Jesus