The problem cannot be human nature because then I should have it too, and I never felt the need to establish a caliphate. The problem is one's worldview; surely you don't claim it does not matter how one interprets the world? And religion is one of the most all-encompassing types of worldview. How do you even start to justify the claim that it does not cause different behavior?
Maybe there's an issue of opportunity here? The human mind is great at self delusion and justifications. Maybe you haven't been in a position to place yourself as a dictator over anyone or anything and therefore haven't felt the urge? There's a saying "absolute power corrupts absolutely".
I think your attitude is the most dangerous one there is. You tell yourself that you're above abusing power if you would get it and that you don't yearn to have it. Of course you would. We all would. The only thing keeping politcians from abusing power is the balance of power. If they abuse their power they are held accountable. The idea that there are people who can handle power is what's wrong with ISIS. Muslims who think that Islamic dictators are different from any other kind of dictator. Communists thought the same about their working class leaders who, due to belonging to their special category never would abuse power once they got it. It's just human.
And there's no shortage of examples from history. When ex Yugoslavia fell apart the bad guys were the "Christian" Serbs. Was it because they were Christian or was it because they simply had more money, weapons and manpower than the Bosnians? The Nazis were Christian. Hitler used the Bible to justify everything he did. Was that some moral failing of Christianity or just because cunts drunk on power are fucking cunts drunk on power? The Swedish king Gustavus Adolphus II used Christianity as an excuse to rape and pillage half of "Catholic" Europe. Do you think he did it because he was Christian or just because he could and grasped at any excuse no matter how flimsy? About a third of the Mongol army was Christian. Another third were Buddhist. The most brutal army and empire that has ever existed. Because they were Christian and Buddhist, or just because they could?
Here's a tip. Don't think you're above temptation and corruption. If you assume you have the same weaknesses and failings as most people you'll be better at calling yourself on the lies you'll tell yourself to justify your more questionable actions. We've all done them. Just some friendly advice.