As a force that had been engaged in front-line combat all year round, Iscariot's training included segments on how to counter Illusion Techniques, but to have this as a part of an interview... clearly exceeded their understanding.
In the end, Iscariot was named a combat unit, but its essence was just an enhanced Purifiers troop. As their creed swore: "Right hand holding a dagger and poison, left hand holding a rope and thirty Silver Coins, swinging the dagger in the night, poisoning during dinner as a pawn of death. When the time comes, they would cast thirty Silver Coins before God and hang themselves with a rope."