Yup, I read it once and it has stuck with me. If an argument starts reasonably and suddenly has a "but", it's safe to disregard the first part, as it will turn out to be a dreadful one. No exceptions.
In any phrase where some Be says 'but' in the middle of it, you can almost always ignore what is said before the 'but'.
I don't think he is a trump supporter. I do think he is a part of the cultural problem of celebrating monsters because you're annoyed by their victims.