He was a Jewish child living in the home of a Nazi bribed to care for him. Could he have refused to help? Could he have punched the Nazi in the nose? I suppose so, but then he would have wound up in a death camp. There's no evidence that I've seen that Soros did anything more than minor administrative work, conditional on him staying alive. Was he a hero? No, but not a collaborator either.
There are lots of Jews who were forced to make far worse decisions to stay alive -- I don't generally begrudge them, and I don't begrudge Soros either for what he did between the ages of 8 and 14. If I were him, I'd have no guilt either.
...oh, never mind..
Nor honor.