A Gentile Soul in a jew body is incredibly rare, and done only for a very much required reason. The jew is not able to advance as we are, so the chances it can see his Gentile Aura are more or less non-existent.
Hitler didn't concentrate anyone. The jew declared war on Hitler, and then Hitler made the Haavara Agreement to remove the jew from Germany. Hitler never wanted to go to war. The jew population increased before, during, and after WW2; and mathematically, it is impossible for the sheer number of jews dying and being buried - especially so during total war. Furthermore, there have been "6 million jews" dying many times since before WW2, before WW1, before 1900, so how many times can 6 millions jews die, and still not be extinct?
If you have read anything in this thread, you would have read that the jew is the eternal emeny of Satan and the eternal of any Gentiles who do not help and support the jew. The "soul" of the jew is alien, different from ours so it is not friendly nor a part of Satan/Gentiles at all.