Aside from the awesome power of forgiveness and grace so beautifully illustrated by the actions of Azim Khamisa, one line of the story stuck with me:
"..buried his only son Tariq according to his Muslim custom". (emphasis mine)
This led me to try to find out more about the foundation that was started by Azim Khamisa, and to find out more about his faith. I found some of that here. One sentence stuck out to me:
"As part of their faith, Ismailis accept a responsibility to work toward a better, more peaceful world. In fact, "peace" is one of the meanings of the word Islam."
Read about Azim in detail here: http://www.azimkhamisa.com/blogs/view/137837/