Then Samuel said to Saul, “Stop! I will tell you what the LORD said to me this night.” And he said to him, “Speak.” And Samuel said, “Though you are little in your own eyes, are you not the head of the tribes of Israel? The LORD anointed you king over Israel. And the LORD sent you on a mission and said, ‘Go, devote to destruction the sinners, the Amalekites, and fight against them until they are consumed.’ Why then did you not obey the voice of the LORD? Why did you pounce on the spoil and do what was evil in the sight of the LORD?” And Saul said to Samuel, “I have obeyed the voice of the LORD. I have gone on the mission on which the LORD sent me. I have brought Agag the king of Amalek, and I have devoted the Amalekites to destruction. 1 Samuel 15:16–20 ESV
The Reformers and Puritans would not recognize as genuine most of what we call Christianity today. Of course one the main thrusts of the Protestant Reformation was to make the Word of God accessible to all people. Why? It is in the Bible that we learn the truth. We learn what genuine worship is and what it isn’t. We learn that genuine Christianity will always have the requirement of obedience to God as what marks a true disciple of Christ. False versions of Christianity will always be marked by a version of the truth to obey that is not the complete truth from God’s Word. Instead, men’s rules are used. Because of this, false professions abound in these false churches. Instead of complete obedience being the standard for believers, obedience to man’s version of God’s standard suffices. Just as Saul said he was obedient when he partially carried out God’s mission to destroy the Amalekites, false churches propagate this sort of thing in believer’s day-to-day obedience. It is all relative. There are no absolutes and only someone ate up with legalism would insist on complete obedience to God.