If there's one thing I've learned from this forum, it's that it takes an enormous amount of time and effort to convince someone of "X" when they are entrenched in their belief in "Y", no matter how logical or reasonable "X" is or how wackadoodle "Y" is..
I think it's a Mark Twain quote that "it's easier to fool a man than to convince him he's been fooled"
People don't like to admit that they were wrong or foolish, especially when there is so much "sunk cost" invested.
It's why prophetic failures create more adherent believers.