Here's why I laugh at Creationists (and I've shared this before: It's ALL me):
If Jesus was the son of God, all he need to say were one of three things so that future generations would believe him:
1. The Earth is not flat
2. The Earth is not the center of the universe. It revolves around the Sun, not the other way around.
3. Hey Jews, pack your bags. We're heading to North America!