The Islamic faith states that anyone who dies while killing 'infidels' is promised a seat at Allah's table (or at his right hand or something like that). Also any 'infidels' killed by someone of the Islamic faith is 'redeamed' and their soul is sent to Allah.
I guess you could say that the Christian God says 'Thou shalt not kill' and Allah says 'Thou shalt kill infidels and yourself'
(BTW: this is just an educated guess from snipets of info. Please tell me if I'm wrong...

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