Willravel

How is 'human nature' vague? How is it not vague? We're talking about the causes of war, and someone replies "power" and we all go home for the day.
It's not complicated, in fact it's overly simplistic. That's the problem
Which war? Israel vs. Lebanon was about Israel's overreaction to a kidnapping and show of force, also intended to destabilize the Lebanese government, and this triggered an attack by the Hezbollah organization, which had some influence and now has more influence in Lebanese government and society. It's a bit more complicated than that when to start putting it in context with the history, but so far as a one sentence explanation goes, I'm happy with it.

There is not one cause of war.

Cynth, the above description is what I would consider the reason for that war. It's not anywhere near as simple as racism or bigotry.
I happen to know some radical fundamentalist muslims. This may surprise you, but they desperately want peace. I don't know any vikings, considering they haven't existed for centuries and no longer have any bearing on the world. I think you catch my drift.
If a religion like that existed, then we could argue based on interpretation of scripture. Fortunately for me and every one else, no such religion exists.
No one believes in Norse mythology anymore, and 72 virgins isn't located anywhere in the Qu'ran. It's hate-filled garbage that simply represents something else, it's foundation, like a wish to force western militaries out of the Middle East by militaristic means.