The soldiers, in that they do their killings under orders and in combat. No. The others, well there has been a lot of interesting debate.
Dietrich Bonhoeffer is a personal hero of mine. He was a Lutheran pastor who stood up to the Nazi's, to the point of being involved in the bomb plot. He was later killed as a result.
He is a hero in the US, but not in Germany. The reason? He crossed the line in attempting to murder the ruler of the state. Many Christians, both Lutheran and Catholic, in Germany feel that was unjustified. Helping someone escape the camps? Great. Attempting to over through the State? Not so, and evil.
They remind that Paul said to pray for the Emperor, even while the same emperor was killing Christians. He didn't say to go out an kill him.
Now, I have read enough of Bonhoffer's writings to know that he did not take that step lightly. And he knew that by taking up the sword, he would die by it. In the USA, we applaud those who tried to end the war by killing Hitler. But in Europe, they are not viewed in such a kind light. Either in Germany or out of it. The Church has often said that violent overthrow of existing rulers by their subjects is not justified in most cases. We never here that in the US, but if you ask a devout Christian from Europe you will.
IOW, "Hate the sin, not the sinner".