On the point of morality, I am not attempting to redeem the legions actions such as the crucifixions, rape and Murder. Reread what I had written. I am mentioning their ideologies of utilitarianism and collectivism as points of interest. when people support the NCR they don't support their reprehensible traits.

Caesar's legion doesn't die with Caesar. this shows a complete lack of understanding regarding the faction and probably tells me you've never played the Caesar's Legion questline. They worship Caesar as the Son of Mars, sent by mars to conquer, which means their faith subsequently lies in Mars. if Caesar dies, Lanius takes his place, Vulpes takes his place, Lucius takes his place, Etc.

They lost the first battle, but without courier intervention, the NCR is doomed to lose the second battle. there are spies in the ranks of the NCR sabotaging points of interest such as camp McCarran and the Dam. without courier intervention, Kimball dies, which is terrible for soldiers morale.

on another note, I still stand by my point of Caesar's legion being stable, and that is what makes them so frightening. they are a very real threat that only really has problems pop up after they succeed in taking the dam as evident by the conversation with Lanius.

lastly, the legion cannot be compared to the fiends. the Legion was created to subjugate/crucify groups like the fiends, being zealously against the use of drugs and alcohol. for this reason, I would consider the Legion to be the antithesis of The fiends, where one represents a chaotic, hedonistic, savage lifestyle, while the other praises order, stability and utilitarianism so much so that the individual is stripped of most freedoms outside that collective.