There’s nothing new about phony teachers in the church.  They’ve been at it for a long time, drawing people after themselves and away from the Lord.  

Jesus warned: “Watch out for false prophets.  They come to you in sheep’s clothing, but inwardly they are ferocious wolves” (Matthew 7: 15). 

 Jesus’ apostle Peter had some choice words about them too:  “But there were also false prophets among the people [the ancient Hebrews], just as there will be false teachers among you [Christians]. They will secretly introduce destructive heresies, even denying the sovereign Lord who bought them [e.g. atheism]—bringing swift destruction on themselves.  Many will follow their depraved conduct and will bring the way of truth [Christianity] into disrepute.  In their greed these teachers will exploit you with fabricated stories. Their condemnation has long been hanging over them, and their destruction has not been sleeping” (2 Peter 2: 1-3).