This argument would almost make sense if the joke was at all about women. Except it's not. The only mention of women on that page is a message that they're included too. The word "bro" is making fun of college age american males, it literally has nothing to do with women at all.
I mean, I'd think this level white knighting would be excessive if it even had something to do with women, but I'm fantastically amused by the reaction here considering that this joke has NOTHING TO DO WITH WOMEN AT ALL. The "offensiveness" of this is pure extrapolation. Seriously, you're all just /assuming/ that women are going to be offended by this. But somehow, those of us that are saying that maybe you should let women speak for themselves if it really bothers them, we're the sexists.