They make great enemies but how can anyone stand by what atrocities they have commited? The NCR has its rough spots, particularly at Bitter Springs, but those types of incidents are the result of miscommunication and bad leadership, not something actively enforced by NCR ideals. The Legion, on the other hand, has no problem enslaving their enemies(which would be anyone who does not subscibe to their dogma, or you know, women) and terrorizing populations.
If anyone can come up with examples of what makes NCR just as bad, fill me in as I have not played Fallout 1 or 2.
So in short:
NCR=United States of America
Legion=Al Qaeda(?)
