[mrandish]

> nobody is going to tell them otherwise

Indeed. As an example, there was a one-line response far down-thread from my GP which basically said only "Mick West is not credible" (which the poster has since deleted). I found this remarkable because Mick West, more than any skeptic I've seen, meticulously cites all his sources and doggedly sticks to only well-evidenced, fully supported facts. No broad claims, blanket dismissals, appeals to authority or consensus. He just does the work of collating relevant evidence and practical experiments which anyone can confirm and replicate for themselves. Because he's not asking us to trust anything we can't verify ourselves, his credibility is irrelevant.

Which made me want to reply, "If Mick West isn't credible, name one source of evidence which counters UFO true belief who IS credible in your opinion?" The obvious point being, there are none, because their belief is unfalsifiable. But then I remembered why engaging with those holding unfalsifiable beliefs is futile... the main point of your post. :-)