Alignment is basically a mechanic for spells and abilities.
Someone who is 100% Lawful Good is probably worse than someone who is Chaotic Evil.
They really are exactly the same, except that the Lawful Good, claims divine right, while the Chaotic Evil claims well nothing not even that they did it.
I'm thinking maybe I need to do some research on the most vile code of conduct in history and base a paladin on that, and then totally justify why I am slaughtering everything. All I need is to start with a convert to my religion or die, now I can kill everyone with impunity and be just as bad as any chaotic evil, maybe even worse.
in other words : do not fret about alignment it is just a mechanic for spells, everything else is justifiable.