Alright then why don't we switch questions then if we are to pre-suppose evidence has not been shown yet. Provide me any evidence that the NCR is rebuilding society? Since Towns do not consider civilization now, so that means they would have to not only provide non-discrimatory polices towards others but have a law in which would repress all that of the wasteland which would harm new soceity.
But what can I proof about the Legion re-building society? Rebuilding society, in any way, would provide this;
That A; Settlements under the particular group are not destroyed at a constant rate, nor are they controlled by an outside gang or group (Regulators for Bone-Yard was a good example)
B; That they are heading in a general direction that some goal entails that society will be a objective(structure) factor in the future that will set themselves above the rest.
And C; That the group has protected theirsettlements from both internal and external harm. But let's see what society's defintion is if you really want to play the pro-NCR game.
"A society is a group of people living or working together. There are various different uses of the term society."
Though let's also see the different uses.
Casual; "society to mean a group of people that form a semi-closed (or semi-open) system, in which most interactions are with other individuals belonging to the group. More abstractly, a society is defined as a network of relationships between entities. A society is also sometimes defined as an interdependent community."
Origin; "The origin of the word society comes from the Latin societas, a "friendly association with others." Societas is derived from socius meaning "companion" and thus the meaning of society is closely related to what is social. Implicit in the meaning of society is that its members share some mutual concern or interest in a common objective."
Or we could view society as nothing more than one class (the higher fuedal lords, wealthy monopolies, wtc) ruling over the rest as a stage of human development.
Take your pick, their(Ceaser's Legion) are scum; but they are a rebuilding society, even if it is one enduced into the roman thought of slavery and of a false thinking that Ceaser(emperor) was ever a god.
Did I say that the NCR wasn't racist against ghouls? no I didn't I simply stated there better then the legion
Which is why you exactly said: "the existence of a Super Mutant ranger is proof its not there policy to discriminate against near-humans..." Though even this statement is wrong. There is no existence of a supermutant ranger, as many NCR citizens, soliders, etc seem to have a fear and hatred for Supermutants. Remarks to lily are evidence. But then if we are to pre-suppose there was a SuperMutant ranger; this doesn't mean they have a policy to discriminate against that species. Our own world is a prime example, union armies enlisted the aid of African Americans and as did the confederacy. Did that mean they didn't discriminate against them? To believe that is to believe pure fantasy about the military in general.
Though if that is to be a non-discrimatory move, why did the NCR only have one. One Ranger Outpost of the entire Mojave to have ghouls near not only a dangerous target but have the others safe from harm. Or what about the NCR Ranger outpost near JacobsTown? Are they there just for giggles, or are they spying on he SuperMutant population to see if they can be eliminated easily or not?
Astor DOES know about the Camp Echo he's the one who suggests it,
Especially when you mention Camp Echo to begin with, since all that in his mind is prior to this is 'kill those poor forsaken ghouls'. I almost wish Set from Fallout One back, only he was perhaps a worse leader for the Ghouls.
WHO in the NCR hired mercenaries?
Ah, the classical 'WELL WHO DID IT?!' response. That and way to go to ignore completely half of that post. So Who could it be? Maybe the Rangers, since they are able to spy at both the great Khans and the SuperMutants. That and see that the mercenaries say themselves they're ordered by the NCR. Unless you want to back-track west and ask every soul and body in New Reno, ShadySands, Bone-Yard, Vault city, Posideon Industries and more of who ordered contacts for these specfici mercenaries we can assume that it was someone who wanted to test out what the Mutants were capable of. Hiring a bunch of Mercenaries with grade-B equipment going up against an entire village of SuperMutants...does that not sound strange to you?
They were either high-under estimated OR They we're to be framed for the 'killings of innocent bystander'.
In Fallout 2 you could find Super Mutants living peacefully in NCR territory, one could be seen as a member of the rangers.
To repeat your statement; 'WHO?!' And where. I'll check it out for myself.
The mission was to provoke the super mutants into attacking, which shows the NCR couldn't wipe it out without reason
Or without a falsified report? You've seen how Chief hanlon was gotten NCR on edge with these military reports, and Super Mutants have never really recovered from the discrimination against them. Ghouls suffered just the same, but apperantly one location of ghouls just entirely proves (fairly low populated location) no discrimatory action against them. That and the NCR is presented as very weak in this game, until...actually it's always presented as weak in New Vegas.
The NCR is of course a democracy so SOME some politicians use anti-mutant sentiments to gain votes from.
Democratic abuse FTL? Democracy isn't really somehing to be abused, as it something a 'democracy' for one class or people above another. So its the democracy of those who control the NCR above those who are under it.
Also; whatever happened to that title the wasteland of America was created off of "no taxation without representation"?

When there is no represenation for the Mojave interests and present them to the NCR.
"They negotiated terms to annex The Strip, Freeside, and many surrounding communities."
Negotiation in this case would be "We give you this amount of money for all of your land". Not a diplomatic deal, rather a deal of people who wanted money then independence. And any anti-NCR action is removed immediately. Such as the Followers, or moving the khans (who would even ally with the NCR after genocide) to isolated areas to die off.
If they find Kimbal and incompetent rube after the Mojave conflict they can vote for someone new.
After a successful war and more "luxuries and commodities" for high class NCR citizens to go into the Mojave and use it as their tourist attraction? Most likely no, they will keep him for another five terms, or perhaps three, after a NCR victory. And make General Oliver Lee Commander of all land forces in any military operation for proving he's better than the Rangers. (His main goal in this Second Mojave War)