I think his proposal to use "per" instead of "they" actually makes a lot of sense, because "they" is very confusing in a lot of contexts, because it's a word already used for another function. I don't see how you perceive that as something negative.

The quote about pedophilia is concerning indeed, but I think that rather stems from ignorance about the issues than promoting pedophelia. It's easy to shit on such things and wokely dismiss someone's entire opinion, which I find a bit weak.