This was an awful experience, but I learned a valuable lesson. When a group of people have exactly one answer to a problem, it's not even worth engaging with them. Even if they have learned to sound reasonable, their conclusion is predetermined. Evangelical fundamentalists of any sort are a waste of time.
[1] Side note: I eventually met more reasonable Christians who found this kind of horseshit just as ridiculous as I did. They had plenty of thoughtful views; even where we disagreed, we could have interesting discussions. So my objection here is not to Christianity (or blockchains), just people who have found their first shiny idea and have let it completely overwhelm them.