I feel like the actions matter less than the intent for matters of morality. If your character wants to save a village overrun by monsters, but the monsters were actually people who had an illusion spell cast on them, your character isn't evil for slaughtering a village because their desire was purely noble. Neutral is having both good and evil desires, usually for personal reasons that make sense for the character. A rogue is going to steal from a town guard as readily as they'll steal from a goblin, they want the gold, they don't care about the morality behind it. Evil is wanting to slaughter the village just to see what adjacent towns would say, it's doing something bad for the sake of it.