The subject is directly and intricately related to gay people, making his opinion of them relevant. It's not like I pointed out that he hates Muslims to prove he's wrong about the tastiness of blueberries.
What does the term SJW have at all to do with men dressed in leather at a gay pride parade? Follow-up question, do you see how referring to gay people as faggots might thin your case about how you're fine with gay people?
The fact that you used the terms "flamboyant faggot" implies that, yes, you do care if people are gay. It's actually part of the demonization of homosexuality that I referred to. And you wonder why they need to be vocal and proud about accepting who they are...