the religion question

so, the concepts of Islam, Christianity, helping the poor, being a good person etc, etc were all floating about in my head as i read chapters 15 & 16 in Three Cups of Tea. i was thinking about all the truly amazing things Mortenson was/is doing in South Asia and pondering how much more concern and care he and his organization have for the poor than many Christians (including myself) that i know. i got excited as i thought: what would happen if someone involved themselves in a movement like that who was doing it because they wanted to love others as Christ loved them first? would it be effective? how could it not be? then i read the chapter in which that one village chief was trying to get Mortenson kicked out of Pakistan and then they investigated his schools to make sure he was truly trying to help the people with no hidden agenda; he was really nervous that he'd be kicked out. not that a Christian has to have an "agenda" with doing good for the poor and neglected, but surely someone with that foundation or basic belief would be kicked out if such an investigation occurred and they inevitably heard that the gospel was being offered or received to any extent.
i know that my God is big enough to reach anyone and everyone, in any situation, in any country. maybe that should be enough, but it was discouraging to me to think that i might not ever be able to be a part of a movement so beautiful and be able to share the reason why i could love so greatly.
another thought: i dont know if Mortenson is a Christian or not, but if he's not...how is he able to be so selfless and loving, receiving really nothing substantial in return for his work, and not do it from an outpouring of God's love??? seems like a pretty sound argument sometimes when people talk about how people can be good without being a Christian and why shouldnt they go to heaven for that?
what comes to mind is how C.S Lewis responded to that thought "can't a person be good/happy and not be a Christian?" he said that what the REAL issue was is not can't i be good/happy but is this Christianity thing TRUE or not? in the end, doesnt it just matter what is true and not what i am able to be or feel in this world?

this probably seems really scattered...just some things i was thinking about.

the book was tough for me to begin but it's picked up considerably and im enjoying it. i am really impressed with Mortenson's work and how he is going beyond the school thing to help in other needed areas as well. i think it would be really cool to visit his school in Korphe or be a part of his work in some way. it's pretty inspiring even though i feel that i dont have the drive, determination and discipline to the extent that Mortenson does.