Bleh. Islam is a religion. If it was the primary religion of the first world, it would not be as extreme as it often is. Since it is the primary religion of many third world countries, countries that are much easier for "religious" groups to exploit, it is much more extreme, and much more political. If Christianity and Islam were reversed, the situation would probably be similar.
There's a point in there negatively talking about the prospects of a cult being described as a religion. I think cults are religions, in the sense that they're no less likely to be correct than any religion. Maybe there are powerful aliens who created us and want our chosen ones to ascend to be with them through mass suicide. All religions have beliefs that probably seem rediculous to many followers of other religions, that's just how it works.
I happen to agree, that, to a certain extent, most(if not all) religion is a response to our own mortality. Even if one religion is correct, it's a good psychological reason for the extistence of most of the others.
Sina critisizes Judaism as being purely political, but ignores the intensely political discourse that went into the creation of the currently accepted New Testament. Most major religions, have, at one point or another, been used as political tools.
Sina talks about religion preaching "goodly manners, honesty, compassion, forbearance, tolerance, love and unity," however the Old Testament preaches all of these things. I don't have the necessary knowledge of Islam to speak for it, but I wouldn't be surprised if these values are tought in Islam also. Many holy books are vague and often self contradictory, and thus can be interpreted in a number of ways. If you pick and choose, you can make it mean whatever you want. Besides, this definition of religion is entirely subjective. If my deity wants me to be badly mannered, dishonest, neglectful, intollerant, and hateful, and my deity represents my only possible source of salvation, my beliefs represent no less of a religion than anyone elses.