I haven't been in a debate with a leftist about this in a long time - I have mostly cut the cancer out of my life.

But if I had a chance, I would try to pinpoint exactly what kind of diversity crosses their red line. Do you want to include people who diametrically oppose what you believe in?

I believe if you press them, you can get them to admit this. If not, they aren't arguing in good faith or are retarded. Once you have established that ALL diversity isn't good you can either convince them further or give up.

Gonna be a lot of giving up, to be fair.