I literally do not look white. No white American would consider me white and there's no way I'd pass as a native in Germany, Czechia or Poland.
You are either trolling or genuinely delusional if you believe this, at least with regards to Americans.
Maybe Northern Europeans could clock you as a non-native, and I frankly doubt that since I've met a good number of Croats here (Slovakia) and not a single one has ever looked non-native to me, but no Croat is
ever going to be considered a non-white in America.
I'd like to point out it's only on this forum people obsess over this stuff insanely
It's not obsession though, it's
delusion. People IRL are never saying "well, those people don't really look white, but let's skip over that," literally
nobody IRL has any doubt that all native Europeans, except maybe Sicilians and some Mediterranean Greek islanders as you like to point out, are white, nor have they
ever been treated as non-white. Literally go to r/askbalkans and try to find people talking about not being considered whites and being le oppressed ethnics or something

, it doesn't exist, "Slavs are people of color" is literally a meme because it's so idiotic.
It's just right wing communities in general
Eh, I really dunno. This, .org, and a few obscure subreddits are genuinely the only places where I've seen people believe in this bizarre idea. It's just something that genuinely doesn't exist among normies IRL.