Bilawal Bhutto raised the 'Musharraf's a murderer!' slogan in front of the charged crowd of PPP supporters in the southern Pakistani town of Garhi Khuda Bakhsh.
Al-Qaeda's slain chief Osama bin Laden had shifted to Afghanistan to supervise a plot to assassinate Pakistan's former premier Benazir Bhutto and then military dictator Pervez Musharraf.
Zardari has held former military dictator Pervez Musharraf personally responsible for the murder of his mother, Benazir Bhutto, as the country observed her 10th death anniversary.
Nawaz Sharif's daughter has claimed that her father was removed from the prime minister's office because he had ordered registration of a treason case against Pervez Musharraf.
Musharraf's remarks came days after he declared himself the "biggest supporter" of the outlawed Lashkar-e-Taiba (LeT).
Pervez Musharraf has now said that he would welcome an alliance with global terrorist and 26/11 Mumbai attack mastermind Hafiz Saeed for the general election in 2018.
Speaking on Pakistan's ARY News, Musharraf also said he liked the global terrorist, JuD chief Hafiz Saeed, and that he had met him.
The former president added he was always in favour of terrorist action in Kashmir, and the LeT and the JuD were the biggest forces to take on the Indian Army in the state.
The children of Pakistan's assassinated prime minister Benazir Bhutto today voiced their disappointment over the verdict by an anti-terrorism court, saying there would be no justice.
The two-time prime minister, was killed along with more than 20 people in a gun and bomb attack in Rawalpindi's Liaquat Bagh during an election campaign rally on December 27, 2007.