It was nonsense from the start. Grusch had no evidence, not so much as a blurry photo or shaky video. All he had was what someone told him. So someone supposedly told him that not only did the U.S. have multiple crashed UFOs and bodies, but that one of them crashed in Mussolini's Italy and the Pope helped the U.S. smuggle it out.
And people ate that shit up. And they're still saying the big revelation is right around the corner, as it has been my entire life.
If it was nonsense, why did the Inspector General find his allegations "credible and urgent", and forwarded them to Congress, where Grusch and other whistleblowers deposed under oath? And why have several Congressional committees announced that public hearings will be held in the upcoming months?
Let's not make the mistake of thinking that just because evidence has not been made available to us it means there is none. We don't get to learn the most highly classified weaponry in the Pentagon, why would non-human technology be released any more widely? If you want more information to be made public, go write a letter to your elected officials telling them this matters to you.
"Credible and urgent" referred to his fear of reprisals after claiming whistle blower status. The Inspector General rightly considers this completely isolated from the legitimacy of the leaked information itself.
My understanding is that it referred to his allegations that some programs are being funded without the necessary Congressional oversight.
Either way, the matter of fact is that Congress is addressing these concerns regarding oversight, not the reprisals suffered by this particular person. See the recently proposed regulation by Gallagher.