Saeed reiterated that the U.S., on India's request, pressured Pakistan to detain him.
"Ousted prime minister Nawaz Sharif has been punished for forsaking Kashmiris".
The JuD chief, who has a $10 million U.S. bounty on his head, was freed earlier in the day from 11 months of house arrest by the Lahore High Court, which said there was no evidence to hold him.
Lashkar-e-Taiba (LeT) founder Hafiz Saeed, accused by India and the United States of masterminding the 2008 Mumbai massacre, was on Friday freed after 10 months of house arrest here and vowed to continue the "jihad" for Jammu and Kashmir's "independence".
A US official said Washington was "deeply concerned" about the release.
He said that his only crime was that he wanted Kashmir's freedom from India and he was arrested for the same.
Hafiz Saeed had been under house arrest since January.
Saeed ran the Jamaat-ud-Dawa organization, widely believed to be a front for the Lashkar-e-Taiba militant group that was behind the attack in Mumbai, India, that killed 168 people.
It took the authorities three days to regain full control of the city, and the attacks, which killed more than 160 people, almost brought nuclear-armed arch-enemies India and Pakistan to the brink of war.
On Thursday, India condemned the decision of the Pakistani court to release Saeed from house arrest.
Saeed in his speech also targeted the Pakistani government for "taking dictation from foreign masters" and spoke of "Indian atrocities" in Kashmir.
New Delhi also accuses the LeT of carrying out terror attacks in other parts of India, including Jammu and Kashmir, where a separatist campaign backed by Pakistan and raging since 1989 has left thousands dead.
Senior government and retired military figures say the party has the backing of Pakistan's powerful military.
MML officials have privately said that the party is controlled by Saeed, but it is not clear if Saeed will seek to contest elections or launch a political career.