“I think this is a new evolutionary development in terrorism, where people go into Syria, they get trained there, they have a passport from France, from Great Britain or from the United States,” he said. “They stay there for a few months and learn how to be a terrorist and then they come back through Turkey and you know they have been there and you know who they are. And I think this event in Paris is going to waken up the people in charge of security to watch those people more closely than they have in the past - and not single out all of the Muslims in the country.”Carter has criticized successive US administrations for failing to clinch an Israeli-Palestinian peace deal. He has advocated controversial positions, chief among them that the West should engage Hamas in diplomatic negotiations.
WATCH: Jimmy Carter says Israeli-Palestinian conflict 'one of the origins' of Islamist violence
A frequent critic of Israel's settlement policy, the former president appeared on The Daily Show with Jon Stewart.
