Ordinary German soldiers were not pursued for war crimes. If you are referring to the ones who participated in the Nazi genocide, they were prosecuted for participating in deliberate acts of mass-murder against prisoners and innocent civilians, which is a whole different ball game from killing the other side's soldiers on the battlefield...
During the Pearl Harbor attack hundreds of civilians were killed as well. Oh! Well collateral damage. No biggee. I can’t beleive how cavalier people are to simple brush aside this level of killing and explain it away.