Why do blk men like 2 date outside the race and get happy but when we blk women do it..?

they get all mad and angry? the reason i say this cuz i have a blk bf but anyways i was at the mall with some white friends and it was 2 white guys with my friends and one of the white boys happened to be just walkin really close 2 me and holdin onto my arm in a friendly way but ppl took it in the wrong way like we were dating anyways tons of blk people started giving me bad looks and one black man held the door open 4 ppl to enter and when me and my friend mike whom is white tried 2 enter she slammed the door of the store in my face and called me a sell out and i think that is very rude even blk guys were yelling out racial/rude insults like zebra,sell out,traitor,cracka lover, yet this guy is my friend y do blk men do this and think it is ok for them to date outside their race yet wheneva a blk girl does it they get angry?