This was a question posed to me: What if the Antichrist decides not to kill the two witnesses? The question was asked in hope of finding out why Satan is bound by the Word of God.
Surely the Antichrist will know what Revelation says he will do during his 1260 day reign of terror. What keeps him from being able to try and not perform one or more acts that scripture says he will perform? Since God said he would do such and such it would seem that his rebellious nature would make him want to defy God and not do it just to prove scripture false and spite God.
This is one of those brain teasers I love to ponder.