I believe ugly men are more harmful to woman.
Are you implying that beautiful men aren't harmful to women?
I am saying all humans are dangerous, even beautiful people are dangerous as they will eventually attack someone
Thinking unattractive people are dangerous is a stereotype based on the ways we prioritize attractiveness. Associating ugliness with violence just furthers the harmful stigma around being unattractive. You should do some research on how certain beauty standards can influence the way we feel about and treat others.
I've done extensive research on how nature builds its own system. Evolution selected desirable traits and people that were dangerous were removed from the gene pool. It's something we have control of.
It's wrong to think that ugly people are more prone to violence over beautiful ones. We have little control over who may or may not become violent. There will always be dangerous people that come in all shapes, sizes, and degrees of physical attractiveness.