Creationist con men are very slick, and very good at what they do.
I read an opinion piece a while back discussing why scientists should never engage creationists on the creationists' terms. The scientists enter these debates thinking that since they have facts and logic on their side, the debate should be a cake walk. They are unprepared for the fact that the creationist cares nothing for facts, evidence, and logic--he is there to make the scientist look like a bumbling fool in front of an audience that is utterly (and willfully) scientifically illiterate.
This opinion piece did point out that there are ways to make the debate less one-sided, but no creationist has ever agreed to a debate with fair terms and conditions.
My opinion, as an educated scientist, is that creationists do more harm to Christianity than any atheist could ever do. To be absolutely clear: Creationism is separate from Christianity. The Christian tradition actually embraces the advancement of human knowledge.
Come on. Ken Ham a con man? Dinosaurs were once vegetarians and peacefully frolicked with humans 6,000 years ago before “sin” and the “flood”. Heck there were even dinosaurs on the Ark. Ken Ham says so therefore it must be true. / s