I agree with much of what you have to say, especially in regards to the difference between Muslims and Islamists. Some of what you say strikes me as a bit specious, however, especially in regards to your comparisons between Islam and Christianity. All these issues in regards to gay rights and whatnot only have to do with lack of representation within the population rather than lack of support or opposition.
Were you to compare the populations of Christians vs Muslims world wide and try to chart the range of attitudes among their adherents, you would find that Islam is far more conservative in nature. That does not mean there are no liberal Muslims nor conservative Christians -- obviously not. It simply means that the relationship between the adherents and the religion is such that Islam is more predisposed towards fundamentalist beliefs. THey are NOT the same despite your claims, they are different, and part of this difference lies in the structure of the religions, themselves. Islam is more predisposed towards rules and laws, whereas Christianity is more predisposed towards spirit. Sure, there are countless Christians who WANT Christianity to be all about rules and laws -- Pharisees all -- an these people can be as annoying as all get up, but that doesn't change the nature of Islam one iota.
If people make excuses for Islam while attacking Christianity, they are acting as hypocrites. THis hypocrisy is even more obvious when they attack Christianity for certain aspects that are much less prevelent and much less strident than similar aspects of Islam.