Convert to Islam, or die.

I'm theist, but my beliefs specifically tell me to not convert, so I'd have to say no, painful and sad as it might be. Besides, becoming a martyr would be kinda cool... Although the preferable death would be standing waist-deep in the bodies of your enemies while swinging a ridiculously good-looking sword around. Boromir comes to mind. That is cool.

But If one thinks about it, depending on what religion a theist is a part of, he/she has more reason to not convert than an athiest. A theist would be afraid of God for the decisions he/she would make, but what reason does an atheist have not to convert to save his/her life, the one they'd never get to relive? Not any good, logical reason, I'd have to say. And indeed, unless there is a better deal waiting on the "other side", it would be irrational to not save your skin by converting.

Jam it back in, in the dark.