I do not think Bobn Lazaar is a whack job (at least not about the UFO’s)
He has too much info- where the cafeteria inside grrom lake, where the bathrooms are. And his background is wiped clean - they say they cannot find anyone who went to college with him- but hey- I went to college with 100 other people 2 and I dont know if any of them would remember me...
He had to go to college somewhere- he certainly sounds like he has in depth engineering schooling. If his name was all over the place and he went somewhere ELSE then that would have been a quick way for somoene else from that school to discredit him.
His description of the gravity propulsion system and the mineral (238?) sounded very likely to be the only way to travel to the stars.
geez I cannot proofread - sorry folks I am a bit dyslexic