Why are black men more calm and nice than black women?

I don't mean to be racist, or prejudice against a particular race or gender but from my experience i feel black men are much calm and nice compared to black women. I don't know why people stereotype black men with violence, drugs etc.

All the black men i know are very reserved and respectful on the other hand black women are too fast to judge, take sides. Why is it black men are considered the most violent of all, whether it comes to crime or guns etc?