The priority to indoctrinate these men was to first change their names.
Isaac Newton once said, "Tact is the art of making a point without making an enemy." That is what Daniel did here. When you are face to face with an executioner who is required to arrest you, you do not want to make him your enemy.
Babylon surrounded Jerusalem with armed forces with the goal to capture and to force them to surrender.
I want to ask you, are you disciplining other people so they understand the teachings of Jesus?