Luke 11.15 and following has him giving as good as he gets. Better. His opponents shot at him for casting out devils. By Beelzebul, they said.
But they do it, He asks by whom? If someone does it by the Kingdom of God, then God is here, the age of the Messiah has dawned.
More: He gives analysis of demonic behavior. The backslider ends up worse than before.
24 ‘When the unclean spirit has gone out of a person, it wanders through waterless regions looking for a resting-place, but not finding any, it says, “I will return to my house from which I came.” 25When it comes, it finds it swept and put in order. 26Then it goes and brings seven other spirits more evil than itself, and they enter and live there; and the last state of that person is worse than the first.’
Jesus talk is direct, even harsh. He was to submit to awful death, but as a preacher he took no prisoners.
Blithe Spirit 