Maybe you shouldn't use the same argument over and over again: there were Jews, there are no Jews, I know nothing about it, therefore the natives killed them all. There is a real danger the Wikipedians will use it to illustrate their argumentum ad ignorantiam article. It's estimated only in Warsaw there were more than 100,000 Germans and Volksdeutsche, every ten person on the street. Do you know how many Polish Jews' testimonies written right then in '40-'43 survived? I have on my shelf 5 volumes of them. It's, I don't know, maybe 4000 pages. Do they support your speculative theory? The answer is a huge no. A small part of them has been translated into English, and is available on Amazon. Read it. You will see the light.