Well, I didn't point to Koran versus about beheading atheists (though that might exist in a lesser frequency as well), so your reply in that regard is a little bit off subject IMO.
The quotes show it is a religion not squemish about slaying people and about lying in the interests of expanding and defending Islam.
Compare these quote with Jesus saying to turn the other cheek, etc.
I'm an atheist as well, but I think
the New Testament is worlds more peaceful a text than the Koran.
Also, these are not just calls in ancient texts and behavior. They are embraced today.
Hamas Charter:
"The Islamic Resistance Movement believes that the land of Palestine is an Islamic Waqf consecrated for future Muslim generations until Judgement Day. It, or any part of it, should not be squandered: it, or any part of it, should not be given up. "
"There is no solution for the Palestinian question except through Jihad. Initiatives, proposals and international conferences are all a waste of time and vain endeavors."
So what Islam and Jihad say are relevant, by the words of current regimes.
Koran and Jihad:
http://www.answering-islam.org/Quran/Themes/jihad_passages.html