The Palestinians, along with the majority of Arab males, belong to what has been called a “Shame” culture, in that they are quick to feel humiliated, and equally quick to defend against the sense of insult - usually by gross denial of their shameful condition, by projection of the humiliated condition onto others, or by massive retaliation against the insulting party. Thus, the Palestinians, who ran away from inferior Jewish forces during the Independence War, and who have never recovered from the shame of that self-imposed defeat, have vigorously exercised all of these contra-humiliation tactics: By claiming that they were forced out of their homes by superior Jewish forces, they deny that they ran away; by mutilating the bodies of their Jewish captives, the Palestinians metaphorically rob them of their manhood; and by launching suicide attacks against Jews they retaliate massively against the Israeli conqueror. http://www.frontpagemag.com/Articles/Read.aspx?GUID=B042F8EA-32BE-45B5-84E1-1E158773531A

See also:
Terrorists sexually humiliated guests before killing them
http://www.mumbaimirror.com/article/15/20081225200812250225081731635eb98/Terrorists-sexually-Humiliated-guests-before-killing-them