In order for Satan to get people to follow him, he must eliminate or at least discredit Christianity, and the Bible.
But there were false prophets also among the people, even as there shall be false teachers among you, who privily shall bring in damnable heresies, even denying the Lord that bought them, and bring upon themselves swift destruction. And many shall follow their pernicious ways; by reason of whom the way of truth shall be evil spoken of. And through covetousness shall they with feigned words make merchandise of you: whose judgment now of a long time lingereth not, and their damnation slumbereth not. (2 Peter 2:1-3)
Otherwise, people will know the truth and not follow him. Satan’s goal is that as Christianity fades away, a new, one world religion will emerge that will accept anything except the God of the old and New Testaments.