To me Petain is a traitor. Sure he was a hero in the Great War but when he got to implement his own policies without supervision then it turned out he was a massive a-hole and either did aweful things or collaborated willingly with people who did aweful things. Among the things he did was that he accepted to turn France from a republic to a dictatorship, which to my knowledge Hitler never asked or demanded from France following its defeat. So in short I could have some understanding, even if I wouldn't agree with it, for doing things that the Nazis demanded from France in order to save French lives, some small nuggets of liberty or what you've got. But considering that Petain and his cronies went further and did it on their own accord looks to me that it wasn't a "lesser evil" choice but an "I want" decision from a band of traitors to France.
But then again I am no expert and don't claim to be one.
But then again I am no expert and don't claim to be one.