I agree. I don't think it's insulting and I don't thing it's despicable.
I just think the whole straight pride parade thing is fucking stupid
"Yay a parade for us! For something that us male human beings have been doing for literally as long as the concept of marriage has existed! This is great! YAAAAAAAAAAAAAAY USSSSSSSSSS"
It's sad sack reactionary shit to not straight people being able to marry. It's pathetic and weird. I don't give one single fuck about what dick fucks an asshole, or what vagina fucks a vagina, and also for whatever words you use for transgender genitalia that they use for fucking. I'm not 100% clear on that, but I don't really care about someone I don't know fucking someone I don't know in general, so I feel like that applies.