Concept of good and evil
So recently I've been looking at different religious text and comparing ideologies. For example, the concept of good and evil. That concept isn't very consistent in Christianity because, if due to the sacrifice of Jesus, evil action of Christians will be forgiven anyway then doesn't that defeat the whole purpose of creation of evil? Staying away and doing it has the same result: salvation. According to Christianity the creation of good and evil serve no real purpose, so why and how could God create something that has no purpose?
You could argue that it would cause a difference in reward but the consequence of evil shouldn't be a lesser reward it should be an actual proper consequence equivalent to the action done.