How do justify "shoe throw" on Pakistani President Asif Ali Zardari ?

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This has been a hot issue in not only Pakistan but also in International media. The story started when Pakistani President Asif Ali Zardari was on his visit to France and Britain, and someone from Pakistan thrown shoe on him. Keeping in mind that the President of Pakistan Asif Ali Zardari took his visit ignoring the huge flood that country was suffering from, do you think that the man is justified in throwing shoe at the president of his own country ? Thanks