He also criticised the Taliban for attacking non-Muslims and said Islam teaches respect for all religions.
Bilawal announced that he and his sisters, Aseefa and Bakhtawar, would become part of the political mainstream before the next general election in 2018.
“We are the children of Benazir Bhutto and Asif Zardari who have always sacrificed for democracy...my father (former) President Zardari saved Pakistan from breaking up,” he said.
PPP leaders have said that Bilawal, who became eligible to contest polls when he turned 25 in September, is expected to enter the National Assembly soon from a seat in Larkana, the traditional stronghold of the Bhutto family in Sindh.
A by-election is set to be held in the constituency after the resignation of PPP lawmaker Ayaz Soomro.