OK! First off I want to get one thing straight, yes I am Turkish, No I am not Muslim in fact I am Christian as well, so I am not being biased.
Now although you continue to say that Islam was spread by the "sword" this is actually really not the case, although the Arab people were spread by the "sword" as most civilizations were, Islam was pretty much completely optional to the inhabitants, but offered perks and in general was seen as God's last will (the last prophet Muhammad) that is why thousands of rural/poor people who were being oppressed by the Byzantine Orthodox Church which at the time was much, much more oppressive then Islam was (I'm Greek Orthodox by the way). And that is why so many people eagerly converted to "Gods" last testament, in fact many people just saw it as a continuation of Christianity rather then a whole new religion itself. This method of not forcibly converting the population as the "Arabs" spread was continued from Spain (southern France even) all the way up to Central Asia. And throughout a sense of toleration for all religions was carried out. Although you are right in some cases there was brief spates of religious hatred, under an Egyptian Caliph (I forgot his name

) he preached intolerance, and called for the destruction of the Church of the Nativity. The destruction of Church was a shock in horror to not only Europe (which led to the Crusades) but also across the Muslim World. After the Crazy Caliph was overthrown, the next Caliph had it rebuilt, and hired Byzantine help to do so. Actually if you want I can send you zip files (its 3 short movies) of this wonderful PBS documentary on the Islamic Caliphates. But PBS does a good job at portraying all sides of it, its part of there famous "Empire Series" the website is here:
http://www.pbs.org/empires/islam/. Its really quite interesting and I'll send it to whom ever would like to see it, as it really is a very well done documentary. For my sources of all the information I have put down, that is the source, so none of this I'm "making up" so this is pretty much hard core evidence.
Ok now back to the wonderful mod of RFC Europe:
I just wanted to say, please take my suggestions into consideration, they can be found below in a spoiler, which took me forever to draft up. Also can 3Miro please explain what this "Defensive Crusade" is?