This is what fascism is. This is what fascists do. They don't NEED a reason, they'll make up all sorts of reasons no matter what you do or don't do unless what you do, is join them.
This doesn't change anything, so why waste your tears on crying over the actions of some guy with a gun?
This is really real. And it's been really real ever since the day your neighbors decided that "democracy" had failed to maintain absolutely white patriarchal supremacy for them so they were done with democracy.