I have talked to a lot of people and read a lot of stuff saying that there is really no good and evil, because evil depends on your perception of it. Like if Hitler thought that killing all the Jews was a good thing to do and would better the world and Germany, then his act wasn't really evil.
To me that doesn't really make sense. There are certain standards that the world judges by, and breaking those is evil. Sure, there's some grey area, but I think most things are either good or evil.