This group of pro-Palestinian probably Hezbollah's member in Iran were shouting "Death to Israel" but all of sudden, the guy made mistake and said "Death to Palestine"....that's very funny. They say while you're lying sometimes unconsciously your mind would say the truth.
Anyway, he found out so he changed his slogan to "Death to America". Whether you like it or not, most Iranians disagree with regime's commitment to Hamas, Hezbollah and other terrorist organizations. In fact people are fed up with regime's spending on foreign groups while Iranians are in economic hardship.
Video is in Persian Language