^ Seconded
There has been other mantras. Nationalism, tribalism (which is responsible for IMHO worst atrocity since WWII, Stalin and Mao, Rwandan Genocide), economy, political ideologies, science (Unit 731 as mere example) etc. and to be all honest, I would not call religion even "winner" here. "Achievements" by Stalin or Mao beats those of Hitler and Pope Alexander II by mile.
Also, "Positive Christianity" was NOT big factor in Nazi Ideology