Did anyone make this claim?
6 million Jews were killed by a wide variety of methods, both inside and outside the concentration camps.
The problem was there wasnt 6 million jews in poland, 2nd millions of non polish jews died, 40 million russians died. what some people are trying to say is no one can prove that they all were jews, infact some estimate that les than a million jews were gassed the rest were polish and russians non jews.