I think Buz has a more specific idea that the Jews would do anything to prevent any body presenting evidence to support the Christian claim of Jesus as the Messiah.
And I think he gets this from Wyatt himself who uses Jewish and Muslim opposition to Christianity as one excuse why he doesn't have evidence. It's a canny excuse on Wyatt's part as it plays into the prejudices of his audience and there is a long history of conflict that this plays into.
it's still a conspiracy theory. and frankly, for all the christian holy sites and relics in jerusalem that are far, far better documented and established than any of wyatt's claims, it's a BAD conspiracy theory too.
as a side note, one time i went for a walk with this lady from my hebrew class. we were going to go pickup an honored guest speaker, the former israeli ambasador to ethiopia who was responsible for the exodus of several thousand ethiopian jews a few years back during the civil war there. i turned to her, and asked "how do you keep getting these incredibly important and famous people to come speak to our little class of a dozen people?"
she said, "oh, i just called someone who happened to know him..."
so i said, "so basically, the evil underground jewish conspiracy network?"
she shoots me this dirty look, half "antisemitism!" half "how the hell do you know about that?" ...then realizes i'm kidding.