Normally I wouldn’t respond to this kind of nonsense, but I thought it might be useful to someone else to note that the Bible, in fact, advocates killing nonbelievers:
Suppose you hear that in one of your towns some men or women have sinned against the Lord and broken his covenant by worshiping and serving other gods or the sun or the moon or the stars, contrary to the Lord’s command. If you hear such a report, then investigate it thoroughly. If it is true that this evil thing has happened in Israel, then take them outside the town and stone them to death.
So, no, the Koran isn’t the only religious tome that says stupid shit.