But that kind of bigoted thinking has rightfully been challenged in the past.
Like, ok; say it is an evolutionary inevitability that mutants replace humanity...that doesn't have to be viewed as a bad thing! Much the same as, because autism is now thought to be a genetic inheritance (and I speak from experience here), it's over-taking of NT isn't the end of the world. It's just society moving on, it happens--especially considering that the diagnosis of autism is much more prevalent now than 10 years ago, even in adults 50+!
Though it will face resistance, that doesn't mean that the attitude shouldn't be challenged, nor that it can't be changed. There'll probably always be an off-shoot hate-group (as you say, it's human nature) but that shouldn't negate progress, even in a theoretical manner!