The Brexit Party leader tweeted a video in which Mr Corbyn said Abu Bakr al-Baghdadi should have been arrested if possible.
Mr Farage’s comments came after Prime Minister Boris Johnson said yesterday that Mr Corbyn’s approach was “naive to the point of being dangerous”.
Jeremy Corbyn, the friend of terrorists. https://t.co/Z65J15NCor— Nigel Farage (@Nigel_Farage) November 13, 2019
In the interview with LBC, quoted by Mr Farage, Mr Corbyn said al-Baghdadi “being removed from the scene is a very good thing”.
He added: “If it would have been possible to arrest him... that would have been the right thing to do.”
Al-Baghdadi was killed last month in a raid by US special forces in Syria.
Mr Johnson said it was unrealistic to suggest the ISIS leader could have been arrested “in the circumstances”.
“I think his approach is naive and it is naive to the point of being dangerous,” he added.
Yesterday, Mr Corbyn was heckled by Richard Cameron, the minister of a parish church in Scotland.
He said: Mr Cameron said: "Do you think that the man who is going to be prime minister of this country should be a terrorist sympathiser, Mr Corbyn?
"Who's going to be the first terrorist invited to the House of Commons when you're prime minister?”
Mr Corbyn faced criticism when he said it was a “tragedy” the Al-Qaeda leader Osama bin Laden had been killed instead of being brought to trial.
In 2016, he told MPs he regretted previously referring to members of terror groups Hamas and Hezbollah as “friends”.
He also admitted laying a wreath during an event which included tributes to a terror group behind the the 1972 Munich Olympic massacre, when 11 Israeli athletes were killed.
The revelation drew condemnation from Israeli Prime Minister Benjamin Netanyahu.
Mr Corbyn said he was instead commemorating people killed in a 1985 Israeli air raid.