In a Youtube video uploaded by the imam he said: "The western dogs are rejoicing after killing one of our Islamic lions. From Al-Aqsa Mosque, where the future caliphate will originate with the help of God, we say to them – the dogs will not rejoice too much for killing the lions. The dogs will remain dogs and the lion, even if he is dead, will remain a lion."
The imam then verbally attacked US President Barack Obama saying: "You personally instructed to kill Muslims. You should know that soon you'll hang together with Bush Junior."
"We are a nation of billions, a good nation. We'll teach you about politics and military ways very soon, with god's help," he vowed.
Imam's Youtube video threatening US President
Some two dozen Palestinians gathered in the Gaza Strip on Tuesday to pay tribute to slain al-Qaeda leader Osama bin Laden.
About 25 people holding pictures and posters of bin Laden rallied outside a Gaza City university. The crowd included al-Qaeda sympathizers as well as students who said they opposed bin Laden's ideology, but were angry at the US for killing him and consider him a martyr.
Hamas police did not interfere in the demonstration.
The al-Qaeda leader was not armed when United States Special Forces stormed his compound
in Pakistan but he did resist before he was shot, White House spokesman Jay Carney said on Tuesday.
Carney said the killing of bin Laden was not likely to affect the US timetable for bringing American troops out of Afghanistan.