According to CNN:
Muntadhar al-Zaidi's feelings were influenced by watching the agony suffered by everyday Iraqis. Most of the reporter's stories focused on Iraqi widows, orphans, and children, said the brother.
Sometimes the 29-year-old journalist would cry. Moved by the tales he reported of poor families, he sometimes asked his colleagues to give money to them. On most nights, he returned to his home in central Baghdad -- one of the country's most violent slums and the epicenter of several of the war's pitched battles.
He's now been arrested and is still being held. How's that for a free society? As much as I could possibly try, I have no idea how al-Zaidi feels. I'll never be able to understand what it's like to be an Iraqi in occupied Iraq, so as much as I want to be able to understand, I can't. However, I fully support his demonstration of dissent and want to show my support somehow.
After hearing of the event, my roommate said to me, "Poor guy. Poor, poor, poor guy. We should buy him another pair of shoes."
Sometimes, at the end of the day, throwing shoes is all you can do.