The Difference
1. Atheists are not the same as believers
Pretty basic difference.
When you challenge atheists about their beliefs, you get rational explanations of how it is based.
If you challenge believers about their beliefs, they quickly become
very
emotional. To illustrate:
Fuck You You Fuckity Fuck
2. Atheists can laugh: Fundies have no SOH at all
Can you imagine a Fundamentalist responding with humour in the way Dawkins did?
Comes back to basic insecurity - you have to be really confident of your ideas to be able to laugh at yourself.
Deep down, fundies know that their religious beliefs have major logical flaws, and they get really upset when anyone points them out.