What makes you think they are clueless? Grunts aren't supposed to think, they're supposed to follow orders and fight tooth and nail. The officer cadre seems intelligent and pretty educated, while the top brass (Hsu, Hanlon, Moore, Oliver, Kimball, Crocker) is a very capable, well educated and experiened grup (the war hawks, while misguided, are far from stupid).
That said, I'm sure the NCR knows about the FEV and its connection to supermutants; however, since it's very sensitive information, it's likely kept confidential, on a strict need-to-know basis. Remember, the Brotherhood of Steel was aware of both Mariposa and FEV-II, while Vree confirmed the source of supermutants. Since they helped the fledgling NCR as a research house, it's not far fetched to assume that they gave the Republic this vital piece of intelligence.
And show trials how? The Enclave was never a political rival to the NCR, they were merely an organization that planned total genocide of the human species and as such they were considered war criminals and treated as such.
That said, I'm sure the NCR knows about the FEV and its connection to supermutants; however, since it's very sensitive information, it's likely kept confidential, on a strict need-to-know basis. Remember, the Brotherhood of Steel was aware of both Mariposa and FEV-II, while Vree confirmed the source of supermutants. Since they helped the fledgling NCR as a research house, it's not far fetched to assume that they gave the Republic this vital piece of intelligence.
And show trials how? The Enclave was never a political rival to the NCR, they were merely an organization that planned total genocide of the human species and as such they were considered war criminals and treated as such.