I think we can get a fairly authoritative pre-emptive assessment of his understanding from your use of the phrase ‘pro-Trump’.

The sad thing is that he is a really intelligent thoughtful & funny person but somewhere around 2014 he fell down a right wing rabbit hole & its taken hold. His kids don't speak to him & I find it really hard, but he's family & I hope that he will wake up & see how mad & destructive this all is.