What about the kids who don’t fit neatly into either category? You’ll be throwing a bunch of people into a group in an arbitrary fashion and then teaching them, perhaps just implicitly, that the group’s standards are “normal” and they are different. By saying this is a good thing you’re disrespecting a ton of people.

This is part of why a racist argument can’t be respectful: it’s fundamentally opposed to basic reality.

Is it possible that such an argument could be made honestly? Sure, by an ignorant nimrod. Does that make it respectful? No, part of respect in an argument is making sure you have a grasp of the basic facts before you spout off. Is it bad to block ignorant but honest nimrods in an attempt to block racist shitheads who have learned to cloak their arguments in polite-sounding language? No, for every ignorant nimrod there are a hundred racist shitheads, and you’re not going to educate the ignorant nimrods by giving equal footing to the racist shitheads.