I specifically said "westerners" for a reason. We killed Germans efficiently. The Soviets were brutal and inefficient, including to their own people, and would have been utterly crushed without massive amounts of Western military aid. Allying with the Soviets was an example of joining forces with evil to fight evil. Also mentioning China here is ridiculous. The massacre of Chinese civilians by the Japanese is one reason why we went to war with Japan in the first place. It's like arguing that the 6 million Jews that were murdered show that we couldn't kill Germans efficiently and the war wasn't lopsided.