My view on this (and I know many disagree, but hey ho, das the internet for you) is that there are gay people out there who look down on straight people. And yes, it is absolutely no where near as bad, its silly to even suggest so, But for anyone to look down on anyone for whatever reason is just plain awful, no matter how privileged/unprivileged the person is.
I think this whole 'Black people/Gay people have it so much worse than 'White/Straight people' so white people/straight people issues are no where near as important' idea actually does more damage than good. It makes me think of these militant feminists who make on that the worst thing in the world is a man, when they have a lot of issues they face too, yet aren't allowed to voice their opinions about it.
My view is that anyone can be racist/homophobic/xenophobic/hetereophobic/whatever and it doesn't matter what your background is