Do girls like dangerous/violent guys?

No, not in general, but women are very (probably too) attracted to confident guys (mostly) and those two qualities often go together. And too often women mistake “dangerous/violent” for confidence — when anyone who is a guy knows that belligerence is often just a way to mask insecurity and weakness. Try to convince many women of that, though, and you’ll get called an “incel.”

But they usually find out — unfortunately for them — on their own. Some lessons can only be learned the hard way for most people, women or men.