I never said I thought it was legitimate, stop putting words in my mouth please and thanks.

Let's not pretend that it wasn't implied.

Maybe you should travel more if you can't see the obvious cultural similarities among whites as a group and say Asians or Arabs as a group by contrast.

Yes, obviously white people are a more distinct group compared to people from other non-white countries. But we are talking about here in America (or whichever white-dominated country you live in). In that context, there is not much that is exclusive to all white people.

I won't even comment on the "white priviledge" nonsense. If you believe that exists you de facto must believe that Asians are incredibly superior to other groups on account of their ability to not only compete with that priviledge but completely dominate economically in literally every single western country. I'd love to hear your rationalization on why whites dominate in societies founded on "white priviledge" though, maybe you'd better check with your local sociology professor and see what the latest hot take is.

You're not entirely wrong, I would argue that a lot (but not all) of Asian people in America have similar levels of privilege to white people economically. But they still suffer from racism that white people do not and a lack of systemic power that white people also do not. There are different levels of privilege, but in general, you are going to have the easiest time in America being white. Being the dominant race in a country gives you the privilege of not having to worry and think about your race on a day to day basis and how it might and does affect the way people treat you and the opportunities you have.