Blaming only leaders for the intolerance of Islam is far fetched. And Hindu's killing minorities cannot be equated to what happens in Pakistan, if not only what happens but at what scale happens mattered.
Ah ! I see, the "We do it a little less here, so it would be fine, but sometimes we try to catchup on the scores" defence. Well played sir, I rest my case, that logic is irrefutable.
It seems everyone is out to get Islam today. And I think I know the main reason ... Islam as a religion leads much more often to religious states. One graphic should illustrate this for you:
And when a state has a lot of people who believe sharia law should be the law of the land, the courts and politicians have to grapple with what are essentially 6th century moral and legal ideas. And not just 6th century in fact, but made by one of the only prophets who commanded an army, and went to war, and wrote things like this:
"It is not fitting for a prophet that he should have prisoners of war until he hath thoroughly subdued the land. Ye look for the temporal goods of this world; but Allah looketh to the Hereafter: And Allah is Exalted in might, Wise."
You'd be hard pressed to find Old Testament prophets speaking this way or being described in this way. In fact, the Jews are admonished for "killing their prophets" who basically went around speaking.
So the "differential equation with initial conditions" analogy is very much a big factor.
Judaism formed to have an exclusionary character - it's hard to become a Jew, and so the Jews were always a minority, never ambitious to make the whole world Jews.
Christianity formed with a "peaceful proselytizing" character, for one thing because when it formed the apostles were the ones being persecuted and they didn't have the power to raise an army and convert people by the sword.
Islam on the other hand was formed that way and the political character of Islam is hard to defeat by populations full of sharia law-abiding, devout muslims. Disestablishment of the Church took a long time, but ultimately there is far less in Christianity that says the Church and Government must be one. In fact, statements like this emphasize the separation of Church and State:
So yeah founding conditions matter, and I think that's why you see so many Islamic states and why there are more Muslims around the world living in democratic countries who truly believe that if their society was transformed from a democracy into an Islamic state, everyone would be better off.
Personally I think Islam is not alone. I think various forms of socialism (Communism, Nazism) are also like "mind viruses" or group memes that tend to want to take over the government. If you look at it epidemiologically, certain ideas simply take over the population (the vector of transmission is almost always primarily young men, especially in bad economies or situations, e.g. hitler youth, or hamas, or vietkong, etc.) and states built around these ideas are intolerant and squash dissent. In my opinion, the greatest political danger lies in ideologies whose proponents obtain power.
