Their (and every races) sinful nature is stripped from them. Which as a Christian I look forward to immensely.
He did not win in the sense of "He's now stronger than God", it was a test of his faith in God's promises. Even he himself says he "struggled with God and yet was delivered" but he does not speak of this as a boasting about beating God in a wrestling competition. It's purposes were much more personal than physical.
If we take the Bible to be true (which I guess we'll say is a thought experiment atm so we can both agree), then he appeared to people other than semites. Consider the Romans and Gentiles that Jesus interacted with. (Once again if we're being consistent in our experiment we have to say that Jesus = God since this is what the Bible says)
Notwithstanding that Abraham was himself a gentile at one point. There is nothing inherently special about the genes of semites, and you can back up that statement with verses from Paul.
Once again you're dealing with that question without bringing the axioms that Christianity brings into the picture.
If we take the system as a whole then we must admit a natural order that is ordained by God. If such a system exists as purported by the Bible then it's clear to see we all fall short of such a moral order.
To be Christian is to first realize this predicament, accept Jesus' righteousness as a covering for your own faults. (Doctrine of Justification)
And second to strive to attain moral perfection under God's moral order while God purifies your heart. (Doctrine of Sanctification)
The real slave in such a system is he who cannot help but infringe on the natural order. Even seeking to attain it would be to admit that you do not currently have it (moral perfection).
And the real free soul is the one who breaks it but has his guilt washed away by his faith.