Part of the problem is the difference in mindset - science deals in the
collective evidence presented in a field. Creationism (and the christianity that spawns it) is based on testimonials and the authority of the individual presenting it.
It's why they get insulted when we say "but where is Dr.X's evidence for that statement - which peer reviewed journal?"
They take it as a slur on the witness rather than the standard scientific enquiry that it is.