He's 100% haplogroup R1b, specifically R1b1a1b, which is Western European.

R1b is not necessarily European, but simply most common in W, NW, and Central Europe. It also occurs in Asia and Africa.

Also taken straight from the abstract:

The royal lineage is composed of the Y-chromosome haplogroup R1b and the mitochondrial haplogroup K.

And now a quote from Wikipedia:

Haplogroup K appears in Central Europe, Southern Europe, Northern Europe, North Africa, the Horn of Africa, South Asia and West Asia and in populations with such an ancestry.

Haplogroup K is found in approximately 10% of native Europeans.[5][6]

I can't verify the claim that "King Tut is 100% haplogroup R1b" (the abstract talks about groups R1b and K but not how they're distributed in the lineage), nor can I find anything about "R1b1a1b" specifically in the paper. These two claims could

Now, even if the claim about King Tut being "100% R1b1a1b" was true, than that would not suffice to conclude that he was white.

R-V1636 (R1b1a1b) is rare, but has been found in Bulgaria, among Arabs of the Arabian Peninsula, among an Arab from Turkey, a Tomsk Tatar, the Italian Province of Salerno, and an individual of unknown descent in Puerto Rico.

Not sure if glowing (and race-baiting for optics) or just not particularly competent when it comes to research.

I could also be missing something since I didn't dig particularly deep, but I couldn't readily find anything that could cement your claim.