Bob Larson is a sensationalist who divorced his wife and married a staffer many years his junior.
Demons are real, and every Christian who has put on the full armor of God (Ephesians 6) has the authority to cast them out.
I had to chuckle at that statement. My baptist BIL once told me the devil/demons can't "touch" Christians. I asked him to whome was the bible written if not to believers and if demons couldn't "touch" Christians why did Jesus warn us (believers) so often in His word about them.
I am of the belief it is a very dangerous thing to believe "you" are immune from the devil's wiles.
Sorry to be OT.