Because it is completely untrue. You need to read a book or journal on black feminism or black male sexism. Or just read about the civil rights movement. shyt, just watch your favorite rap video.
You, like a lot of the "brehs" on this forum, refuse to see anything except through your own lens which is why you cant understand how all men benefit from this Patriarchal society over women.
I understand things that make sense. It's not my fault that you aren't intelligent enough to make a sensical argument here. You say that black men benefit from institutional sexism in this society and your argument supporting that basically boils down to "because......read about the civil rights movement ......uh........look at rap videos rap videos.......you need to read some black feminist propaganda". If you can't do any better than this then you shouldn't have even quoted me.
The civil rights movement was not an institution. Furthermore there were no rights that were afforded to black men courtesy of that movement that were not afforded to black women also. Black men and women "benefitted" the same from the civil rights movement. Whatever sexism that was going on back then was perpetrated by individual men who were not empowered by a system or institution.
Rap videos? Black men don't control the hip hop/rap industry. A lot of these guys don't even have control over their own videos. The rappers are being exploited too.
It's clear that you don't even know what institutional sexism is. Institutional sexism refers to ways in which people are discriminated against systematically based on their sex. Black men don't have any control in the system and aren't systematically privileged over women. White women are clearly privileged in this system/society over black men. There are a lot of ways that black women are privileged in this society over black men too. White men are the only one's who benefit from systematic sexism. This isn't a patriarchal society, it's a white male patriarchal society. Black men don't benefit from institutional sexism we're victimized by it. If you took your head out of the sand and looked around you'd see that there are certain forms of discrimination in this society that effect black men more than any other demographic. The way that law enforcement and the judicial system as a whole systematically targets black men is a form of institutional sexism. Black men are discriminated against in the job market more than any other demographic. That's another example of institutional sexism.
You're a shyt poster.