Flamestrike
Legend
We have an Oath of Vengeance paladin that is LG. I think it's fairly open to interpretation given that there are races that are inherently evil, like Devils and demons.
And yet in DnD cannon outisders like devils and demons can (and do) change alignment. Asmodeus (and all Erinyes) were all once LG angels, Grazzt was once a LE baatezu, and Eleudecia[FONT=arial, sans-serif] [/FONT]was a LG succubus paladin. The Titans were all once CG inhabitants (of Elyssium from memory) before a few chose to rebel and got kicked down into (I think it's Hades?) where they're all NE/CE (mostly) now.
The moral of the story is that DnD, even inherently evil or good creautures like fiends and angels have free will and can change alignment.
I find any tenent or part of a code that commands act of genocide and ruthless pitiless murder (whether thats against infidels, a particular race or ethnicity) to be incredibly hard to shoehorn into anything other than 'evil'.
No Godwin here, but the Vengance paladins oath makes outright genocide of a whole race of people, or religious group OK.
Dont get me wrong. Im sure they think they're good people, and what they are doing is just and righteous. But that doesnt make it objectively so.
A LG paladin of Vengance who has 'The nation of Thay and its peopele' as his chosen foe, who tosses screaming and wailing Thayan children on a pyre, is certainly fulfilling his oath, but isnt exactly how I picture my LG. It aint even LN.