This is nothing new. It is a correct emphasis on God's grace and justification by faith (All things are lawful, but not good for you, etc.) and the Gnostic heresy refuted by the Apostle John in I John 1:8-9. Couple this with the warnings by the true Messiah, Jesus of Nazareth and this becomes really dangerous.
Jesus answered: "Watch out that no one deceives you. For many will come in my name, claiming, 'I am the Christ,' and will deceive many. Matthew 24:4-5.
But there were also false prophets among the people, just as there will be false teachers among you. They will secretly introduce destructive heresies, even denying the sovereign Lord who bought them—bringing swift destruction on themselves. II Peter 2:1-3.
If we claim to be without sin, we deceive ourselves and the truth is not in us. 9f we confess our sins, he is faithful and just and will forgive us our sins and purify us from all unrighteousness. I John 1:8-9.