[High Praise! to Stilton’s Place]
The shooter hadn’t bothered to hide his political anger from others because he didn’t have to. So pervasive is anti-Trump (and Republican and conservative) rhetoric and calls for violence on social media that his many posts and re-posts on the subject didn’t strike anyone as out of the ordinary. He was just a needle in a hate stack.
Let that appalling thought sink in for a moment.

Does a fish care about the water it swims in?
kooky people hanging around kooky people, everyone seems normal.