If it helps in anyway, I, as a muslim would like to say that - Islam is the the only religion that made sense and worked for me. Other religions were difficult for my limited intellect to grasp. And I do not doubt the sincerity of those who follow other religions. I do not doubt that they derive spiritual benefit from it. I have seen it in sincere Hindus, Christians and Buddhists. Heck, I have also seen sincere athiests whose spirituality I do not doubt. Spirituality, for me, is about the integrity of the human being as a whole - his conscience, intentions, words and actions. I do not measure spirituality from words alone. I will also add that the greatest trails of being a muslim for me have been the attitude of muslims themselves.
I hope the above helps a little bit in creating some room in your mind to accomodate a feeble good opinion of a muslim when you encounter one in your life. At the end of all this discussion, what I pray for is that we do not harbour ill feelings by default against adherents of another faith. To me, that is of utmost importance than what one thinks of islam.