I don’t want to say about the frequency or which way is more effective, but there have been nonviolent revolutions. Wikipedia even has a page about it. It took me only a few seconds of searching to find it.

So, the comic author is mocking people who make conclusions without actually looking at the data, and meanwhile, they seem to have written the comic making the opposite conclusion ironically without actually looking at the data, either.

It would be so nice if things were always one way or always another way, and people love to assume that their common sense and existing knowledge will be enough to make conclusions, but the comic is right in that regard. If you tell other people your conclusions but you haven’t done the research, you really do open yourself up to looking foolish… Not that it seems like most people care about that these days.