>>17867204 (OP)They're probably Wusun, allies of Xiongnu/Huns who drove off Yeuzhi/Yu-chi/Yuti/Guti/Gete earlier few centuries ago. Wusun are a branch of Yeuzhi/gete people, so they're white or atleast Hapas. The Yeuzhi/gete initially moved west-wards towards the caspian seas as they fled from the Huns, in their escape, they met with other Sakas and drove them down to Bactrian(Afghan/Pakistan) areas. They became indo-bactrians. The Yeuzhis werent satisfied that indo-bactrians were in their rear, so they tookover the greeco-bactrian area and established themselves in the region. Later on, one of the Yeuzhi prince unified Yeuzhi confederacy under 1 kingdom. The Kushans. The Xiongnus were later defeated by China in their wars. And they were pushed further westward, just like how they pushed Yeuzhi westward. So they choose similar path. One of the path was south west, the Kushan area. They knew the Kushans were an old enemy, so they took over the Kushan empire. The "white huns" just likely means they're either Xiongnu or likely Wusun ally, who are white/hapa.
Also, prior to the westward migration towards the caspian seas, there also rested Massagete confederacy. So Saka/Scythian are part of Massagete. But then so are the Yeuzhi (Chinese) -> Yu-chi -> Yuti -> Gut -> Gete. The area around the Pakistan/Afghan has plenty of current day Gutis, Guj, Jats, etc. They're likely from the same ancient Gete nomadic people. The older gete from the caspian seas also migrated westward multiple times. First with the Yeuzhi pushing them out, then with the Xiongnu pushing them west. Thats where the great Roman nomadic wars happened.