I think it's referring to the internet joke. In gifs of crashes/falls/other assorted bodily injury, if the person's shoes fly off, then they probably died. If not, probably alive.
I've been seeing that term pop up a lot now lately but it's pretty much universally been extreme left people crying that their views aren't popular enough to be mainstream.
But I agree, the rhetoric in the op is not what we should want to be
Fuck that, none of us can do anything to stop it. Blame the actual people doing it.