Because LGBTQ people just appeared out of nowhere, willed into corporeal existence one day in the mid-80's by the manifestation of the Woke Mind Virus, and totally haven't existed in every civilization at any given time throughout the entirety of human history.
Really cool how they just casually suggest genocide like this.
I mean, whatever, at this level of homophobia they clearly want to exterminate anyone who isn't a cishet Christian. "Pushing their buttons" is just a shortcut to get them angry enough to admit it.