“The best lack all conviction, while the worst are full of passionate intensity.”

- William Butler Yeats

The fundamental (pardon the pun) flaw of atheism is that I am having trouble seeing how it can withstand the onslaught of fundamentalist religion for a broad range of people over a broad swath of time. I can well imagine (and history has demonstrated) that a bunch of crazed religious fanatics with guns could easily defeat an equivalent number of relativistic atheists.

The religious warriors know that god is on their side and paradise awaits them after their death.
The atheists just think it's sad that their opponents are so deluded. I haven't heard about any atheists flying planes into buildings or blowing themselves up. For that kind of gross evil, you really need to have a burning, white-hot faith.