If you think he did something illegal, report him to the police or sue him. If not, then this is freedom of speech.

…and? People also have freedom of association, and people can choose not to associate with an organization that employs someone with morally awful beliefs - especially when they make those beliefs very public.

The way my brain rationalizes it (inverted y, normal x) is that the closest analog to my hand on a mouse is my hand on top of my character’s head.

To make that head look up I pull my hand back, which is the same exact motion as pulling the mouse back. So it feels natural.

To make the head look left, I would rotate my hand counterclockwise. Rotating a mouse doesn’t do anything, so I have to translate that to lateral motion, and left to look left feels more natural.

Of course the real explanation is that the first mouselook games I played defaulted to inverted y and normal x, so that’s what I got used to. And even before mouselook became a thing, I was playing flight sims, which default to inverted y. Still, it’s fun to try to rationalize something that ultimately boils down muscle memory.