I think I'd define a "criminal" as someone who knowingly broke the law, for whatever reason. Someone breaking a law they didn't know existed or by total accident I couldn't consider guilty in a moral sense.

But there's also the whole concept of the immoral law -- would you considered a person a criminal if they "illegally" helped save Jews, Gypsies, or whoever, from the totally legal but also immoral and inhumane laws of the Nazis?

In the end, I suppose it is all relative.

Stealing bread to feed your family is still considered a crime. Some of us can't blame them.