If we're trying glean something from his experience that might go some small way toward explaining why someone would shoot up their countrymen for a foreign cause, then we're going to have to dig a little bit deeper than run of the mill compassion. The reason I ask the question is because I disagree strongly with your point about our media coverage being slanted toward atrocities against Christians. I don't find that to be true at all, in fact I find that quite unlike the Muslim world, Christians don't seem to feel much kinship between one another at all. Your average Western Christian has no idea what's going on in Central Africa to other Christians, and in my experience aren't particularly bothered even when they do.
First of all, for still finding the opening to slide in an emotive sensationalist statement that very cleverly undermines my experience.
Second of all, maybe Western Christianity of recent times haven't still the open scars of colonialism, oppression, genocide etc to a comparable extent? These sort of conditions are pretty powerful when it comes to people developing a feeling of "kinship".