Michael Flynn, the current head of the Defense Intelligence Agency, spoke at the Aspen Security Forum in Colorado over the weekend and gave a disturbing warning about the current Gaza conflict, remarking, “If Hamas were destroyed and gone, we would probably end up with something much worse.”

According to Reuters, Flynn does not believe taking out Hamas is the answer. He said he very much doubts there will be peace in the region any time soon, and went after Hamas for building all those tunnels that helped them fight back against Israeli forces.

But as for Hamas itself, Flynn said that “a worse threat” could come along, even suggesting it could be “something like ISIS,” the terrorist group that claimed territory in both Iraq and Syria in the past few months.