Most people don't care who attends the gay pride parade.
It doesn't affect their vote one whit, whether they're gay or straight.
I would venture to say that most people don't care what people's stance on gay issues are. If there are indeed gays in Harper's entourage as you allege, that would be one proof of that.
Look, if some gay candidate says he's going to vote pro-life, I'm voting for him.
The gay pride parade is not a blip on most people's radar.