Why does the antichrist and false prophet get thrown in the lake of fire and?

The antichrist, the beast, and the false prophet are SYMBOLS ONLY. They are NOT three separate persons. They are all a symbol of Satan, a fallen angel. The lake of fire also is a SYMBOL of the final destruction (the second death) of Satan. The rider on the horse is a SYMBOL of Christ. The sword coming out of His mouth is a SYMBOL of the Bible (the word of God). The Bible is also The Law of God. The law HAS ALREADY CONDEMNED those who are going to be killed during The Day of Judgment. Those who are alive during the time of the Day of Judgment will die from various physical causes. Then on Oct. 21, 2011 the whole universe will be destroyed by actual fire. 2 Peter 3:10.