Why did the king sign a decree that everyone had to pray only to him?
The king signed the decree because those who hated Daniel and knew his prayer habits deceived him into doing so. Unbeknownst to the king, they manipulated him to sign a decree requiring everyone to pray and bow the knee only to the king of the Medes and Persians.
Les explains that the decree came out by virtue of the king because of those who hated Daniel and knew his prayer habits. They got him to sign it unbeknownst to the king. The decree required everyone to pray and bow the knee only to the king of the Medes and Persians, which put Daniel on the outside. Les is digressing from the prophetic aspect for one program to talk about prayer, stressing that the Christian community needs to come back to the basic tenet of prayer.