Youtube takes down HISTORY videos plenty of the time, and I do find that stupid, but that's not an argument for violating their right to choose who to associate with.
Youtube is actively hostile to the creators I watch, but that doesn't mean they should be legally compelled to broadcast any and all content that someone uploads. They are well within their right to control the narrative that exists on their private platform.
This is just like how elon is well within his right to control the narrative on Twitter now, and make it a safe haven for right wing trolls. I don't like that, but you won't see me advocating ending his right to freely run his business. That's authoritarian. Nobody puts a gun to my head to use twitter, so I don't use it.
There are multiple alternative video platforms out there, including small ones started by the edutainment youtubers and there is nothing preventing all the right wing youtubers from starting their own system. Hell, Nebula was literally using a white label private video distribution platform for a long time! All they have to do is sign a check and they can run their own youtube!
