During a debate with William Lane Craig, atheist Sam Harris points out that if Islam is true, everyone in the audience will go to hell forever, yet they don't seem to be worried about that possibility. Perhaps they shouldn't be so sure that their conception of the afterlife is accurate, given their nonchalance at Islam's threats of eternal damnation.
Note: I'm not posting this video in defense of Islam. I'm an atheist, and I don't think any vision of the afterlife is correct. Some people have messaged me about this, so I just wanted to make it clear.