I just ignore it, we all know they don't actually believe it in their heart of hearts. It's just a failure of empathy, which is all too common nowadays.
People just like being edgy, best to give them no mind.
I view it as pointing out the irony/hypocrisy in the conversation.
Killing an entire species to save a few humans. Being concerned about the ecological disaster when we are the worst ecological disaster. Those are pretty hypocritical viewpoints although common and completely normal with the constraints of normal human behavior.
Picking the side of your children at the expense of an entire species is exactly the normal human behavior I speak of. We do any thing to better our interest even when this issue is very unlikely to impact the average human or their children.
Also It’s not as black and white as you’re painting it. I happen to see it both ways and side humans too because, why not? I am not team mosquito. (I think you’re mistaking me for someone debating with you, I just jumped in the thread to say I see there point, doesn’t mean I agree with it and it doesn’t mean they lack empathy. There is this thing called dark humor and it’s possible to hold that alternate view as a point of humor.) Also not returning to comment.
Individual humans aren't an ecological disaster, some systems weve chosen at macro scale create ecological disasters. Some humans getting maleria won't reduce that, if anything it will waste even more resources.
That's also humans, though.