Salaam Dear Sister,
Your wonderful story could be simplified by:
A very simple answer!
I believe, that wrong teachings coupled with greed are the problems.
If we could solve those two problems then we will have peace.
Only Allah could solve this!
At the moment Islam is not doing much in the form of helping the non believers, it is a close shop, and we must learn to be more open toward any unfortunate person, not with bombs but with good deeds.
Islam in the past was a leader in many fields, there is no doubt that Christianity have suppressed and caused the fall of Islam, but now with about 1/5 of the world population following Islam, we should be the leaders, instead of being the followers.
In summary not 1/5 of the world crimes are performed by Islamic followers.
My Regards and respect to you,