Counter-part of this is people from countries under western imperialist pressure or umbrella claiming that existence of queer people or communities in their society as western subversion. Not realizing this attitude gives easy justification to imperialist projects as far as invasion and occupation.
Of course the military-economic dominance will always try to find socio-cultural excuses to legitimate their blatant materialist or imperialist aims. Back in 19th century it was that Orientals were too effeminate and sodomite to govern themselves, now it is the opposite and they are too bigoted and sexist.
Still, this doesn't excuse very real and sometimes violent prejudice queer people suffer in those countries but indiscriminate mass killing is so obviously contrary to any queer liberation that you have to immediately assume the person suffers from ideological brain rot to even remotely consider that the way to save a group of people from oppression is to kill all of them.
I suppose the phrase "Kill them all God will know his own" is not exclusive to belief systems with an after life, since that's only logical conclusion any of these people who got their brain fried from audaciously blatant propaganda could reach.
It is just classism and the timeless urban against rural conflict. A person who becomes one or the other gets the convert's zeal. There will be people justifying this saying they have problematic attitudes and behaviors but I don't put much faith in this because often the person doing the criticism have all sorts of unexamined beliefs themselves.
If someone is born into better circumstances and never question their own attitudes and behaviors they can't be expected to have necessary perspective to evaluate the beliefs of others in more unfortunate circumstances in good faith. This of course doesn't mean social circumstances and people in that situation cannot be examined or criticized rather it has to come with self-awareness.