They are a very small minority estimated about 200000 to 300000 people out of a population of 82 million exact numbers are difficult since Germany as most European countries does not record by ethnicity only by nationality. BTW Israel was furious when Germany allowed the Jewish people from the former USSR to immigrate to Germany It took long diplomatic deals between Germany and Israel and Israel asked Germany to limit immigration to a certain amount of people annually. If the topic interests you the Jewish people from the former USSR are called Kontingentflüchtlinge in German.
The name derives from the deal between Germany Israel and the USSR.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.