Caesar really is the West’s whole “we have education and culture so it’s okay to commit genocide against tribal communities”
Well, not really. He’s openly a fascist. One of the dialogue lines explaining the legion is that he wants a “authoritarian, nationalist state” iirc
However it comes from an odd place, since he basically holds an odd understanding of historical materialism, in which because society has in some places fully fallen apart, the world needed to go up from a slave society to advance.
His reason to conquer the NCR is not because he thinks they’re bad (in fact, he praises what he for example sees as the dictatorial tendencies in the society) but because it’ll create a synthesis between the Legion and it, creating a stronger third, with New Vegas as a new Rome.
He’s a fascinating character and I love him, which is why I kill him every playthrough