I think that the 'some' that your talking about are the ones who have only had bad experiences with straights, so have nothing else to go off of other than 'they hate me 'cuz of how I am so I should hate them too' or something like that
I REMEMBER SEEING ARTICLES ON WHY GAY PEOPLE ARE "BETTER" THAN STRAIGHT PEOPLE. THIS IMAGE WAS THE FIRST THING TO COME TO MY MIND WHEN I SAW THOSE ARTICLES: