It's pretty simple. No straight guy wants to look at gay porn featuring men. And since the only difference between gay and straight men is the sexuality part, the only reason to draw attention to this difference is sexual.

So there's no surprise in the rejection received. If you don't reduce yourself to your sexuality, neither will anyone else. You may get called a faggot, but you also may get called a motherfucker. Both are curse words not to be taken literally.