Here's the thing about the black brute stereotype it was one of the selling points for then KKK. It's the reason black men are viewed as more of a threat by any white person with a firearm. There is historical precedence for this shyt. For black men being killed behind it. Toxic masculinity is just a re-branding of that.
We go around accepting feminine shyt too much and we think this shyt is going to stop. U got so called masculine black dudes using stupid phrases like 'shade' etc.
Other groups in america don't do this cause they are primarily focused on doing business among each other and trading with outsiders and not worrying about superficial trash like looks etc.