Why will Satan pour out his anger and wrath upon the human race?
Satan will pour out his anger and wrath upon the human race because he knows his time is short. This occurs when he is cast out of heaven at the midpoint of the Tribulation, as Revelation indicates, and he is pulling every stop in his limited period.
Les explains that Satan is already pulling every stop because he knows his time is short. When Satan is cast out of heaven at the midpoint of the Tribulation, the Book of Revelation says he will pour out his anger and his wrath upon the human race. His driving motivation is that he knows his time is short.