Religion basically says our whole relationship with God is based on us being filthy & Him cleaning us. Where would religion be without sin? It wouldn't exist. Since God is not charging us with sin & Christians don't need to be sin conscious who is pushing the concept of sin in religion? The deceiver, the accuser, Satan himself. As Jesus said he does, Satan steals the truth. With the truth out of his way he can destroy our perceptions of God, ourselves, others, & all of life.
I honestly believe the #1 way Satan steals the truth is by sermons presented by self-professed leaders. When you perceive someone as "above you" because of a title in front of their name or a position they hold you are utterly opening yourself up to believing falsehood. This happens when you either let them do your thinking for you or you assume they are more apt to receive & understand truth than you are.
The truth is Jesus forbade the existence of official leaders & He told us that He'd teach us Himself by His Spirit living in us. But Satan stepped in & said, "You must have official leaders in every group of Christians. You cannot trust your heart to hear God's voice, always doubt yourself if you think you've heard Him. You should trust the leaders to tell you what God says in the spirit & in the scriptures." The church system is Satan's substitute for living in & with the family of God. Regardless if the person is aware of it, has a great character, or even preaches the truth church leaders (pastors etc) are Satan's substitute for Jesus & the Holy Spirit of God.