As near as I can tell from seeing how they use this word, what they really mean by "humiliation" is how enraged they feel when anything happens that prevents them from getting/having absolutely everything they want.
A muslim is "humiliated" when a Westerner has a better car then he.
Muslims are "humiliated" when they stand next to a taller or stronger non-muslim.
A muslims were "humiliated" when the Wright Brothers invented airplanes. And so on.
IOW, muslims have the mentality of an angry bitter 10 year old.