Nasrallah made the remarks on Saturday during a ceremony marking the 13th anniversary of the withdrawal of Israeli troops from southern Lebanon, known as the Liberation Day.
The Hezbollah leader said,” today we are facing with two main threats, which I will tell you…the first one is a threat which has always been dangerous since the Nekbah day and that is the threat of the regime of Israel and its greedy nature, and the second threat is the crisis in our neighboring Syria, near our borders where takfiri elements have entered”.
He was referring to the events of 1948 when hundreds of thousands of Palestinians fled or were driven from their homes under Israel brutal attacks on their homeland.
Speaking on the western-backed bloody insurgency in Syria, Nasrallah said the ongoing war in Syria is part of an American project to change the balance of power in the region in favor of the Israeli regime.
Nasrallah said that Takfiri groups, who consider as infidels all Muslims who do not share their extremist ideology, were the prominent force in militant-held areas in Syria.
“We have been promised this disease will reach Lebanon and here lies the danger,” he said.
“This ideology does not accept dialogue for the slightest reason: it labels others as infidels and sanctions their bloodshed,” he said, adding that takfiri groups would pose a threat to Lebanon, and all its religious components, should they seize Syrian governorates, particularly ones on the border with Lebanon.
He, however, promised victory against the Salafist groups in Syria.
"I say to all the honorable people, to the Mujahedeen, to the heroes: I have always promised you a victory and now I pledge to you a new one" in Syria, he said.
"We will continue along the road ... bear the responsibilities and the sacrifices. This battle is ours ... and I promise you victory," he said.
The leader of the resistance movement also dismissed accusations that Hezbollah is a sectarian movement.