https://en.m.wikipedia.org/wiki/Non-repudiation
Legally you have to be able to prove someone received a thing. It's why you get served when you're sued. An agent physically hands you the complaint (or whatever they're called). If the papers were put in the mail the person being sued could say they never received them.
If it helps, those guys treat other guys the same way.
Also if it helps there are women who treat other people this way too.
This seems akin to racism to me. My favorite quote about this is from President Lyndon B. Johnson. "If you can convince the lowest white man he's better than the best colored man, he won't notice you're picking his pocket. Hell, give him somebody to look down on, and he'll empty his pockets for you."
My dad isn't this kind of guy, but he is an old white guy that watches Fox News. And it's the same thing with them. He has bought any number of supplements advertised on Fox News, and believes wholeheartedly that one day the world will finally understand the deep wisdom he believes in.
I don't believe you can categorize people as a simple either or. "You're a red piller or not." "You're a conservative or a liberal." But I do think you can apply a personality type to people. And it sounds like you sussed out a guy who really needs to feel superior to other people. I fucking hate those kind of people. So good for you, there are a lot of people who may have never figured it out, or weren't socially aware enough to see it. It sucks this turned out to be what it was, but celebrate the fact you're a strong enough person not to put up with it