carol there are huge sections of society that are disadvantaged one way or another. Women and disabled to name two. They don't strap explosives onto their backs and murder innocents.

There is an enormous difference between being "disadvantaged" and being invaded and occupied by foreign governments, resulting in the loss of tens of thousands of innocent (civilian) lives. As McGrath pointed out, one doesn't need to be the one directly affected by these things to be impacted upon and influenced by them. When one member of NATO is threatened, all other member nations have agreed to come to their defense (with force of arms). This is not so different from the idea of Muslims coming to the defense of other Muslims.