Time for a little history lesson and some comparisons.
Islam:
632 A.D.? I think it was about this time that Islam started its spread from Arabia. It didn't happen peacefully. The Koran calls for all obedient Muslims to spread the faith, by force if necessary. The invasion of France was finally halted at Tours in 732 by Charles Martel (The Hammer). They ruled most of Spain for the next 700 years until Spain was finally liberated in 1462 by King Ferdinand.
During that time, Muslim armies also attacked from the east, conquering Constantinople in 1453, the Balkans thereafter and in the last invasion of Europe, beseiging Vienna, Austria in 1683.
I'd call that a good thousand years of attacks against non-Muslim Europe. Initially, Christians and Jews were allowed to live peacefully in the conquered lands without a requirement to convert. Jews and Christians were considered "People of the Book (Bible)" and not polytheistic pagans, who had the choice of convert or die. Frankly, I don't know when they changed and gave Christians the choice of convert or die. I believe it happened during the crusades and could well have been a response to the same ultimatum by the crusaders.
There are major differences between the crusades and the Islamic invasions. The crusades were directed solely against Palestine and primarily Jerusalem. This was the Holy Land. There was never a plan or attempt to conquer all Islamic nations or convert all of them.
What about Christians. Yes, we have the inquisition. That was directed mainly against other Christians and has been repudiated by the Catholic church. Abortion bombers/terrorists? While they have some support among Christians, 99% of those who oppose abortion also oppose the anti-abortion bombings and killings, have been quick to publicly state the same and have assisted law enforcement in bringing the terrorists to justice. The inquisition is old history, the anti-abortion terrorism is recent. Compare that to Islamic terrorism and you'll find that only a tiny percentage of Muslim politicians, clerics or even ordinary citizens will condemn it and actively seek to end it.
The Islamic expansion in Europe, Asia and Africa was stopped by either extreme distance from the source or military superiority. The Islamic culture has essentially stagnated since the 1500's. It is not a religion of peace unless you are a Muslim. While there is much to admire, on this topic, the Koran requires Muslims to convert the entire world, by fire and sword if necessary. Those who claim that they are a peaceful religion and just want to get along aren't following they're own teachings. Those who do want to carry on the jihad are stopped only by military inability.
The post that started this whole thing said Bush was an idiot. I don't think he is. He's just a politician who is trying to avoid biting off more than he can chew at this time. Lets take care of Osama, Al Quaida and Iraq first. Iran, Saudi Arabia and the rest can wait their turn. Its like eating an elephant. You have to do it one bite at a time.