16 Then Samuel said to Saul, “Wait, and let me tell you what the Lord said to me last night.” And he said to him, “Speak!” 17 Samuel said, “Is it not true, though you were little in your own eyes, you were made the head of the tribes of Israel? And the Lord anointed you king over Israel, 18 and the Lord sent you on a mission, and said, ‘ Go and utterly destroy the sinners, the Amalekites, and fight against them until they are exterminated. ’ 19 Why then did you not obey the voice of the Lord, but rushed upon the spoil and did what was evil in the sight of the Lord?” 20 Then Saul said to Samuel, “ I did obey the voice of the Lord, and went on the mission on which the Lord sent me, and have brought back Agag the king of Amalek, and have utterly destroyed the Amalekites. 1 Samuel 15:16-20 NASB
The Reformers and Puritans would not recognize as genuine most of what we call Christianity today. Of course one of 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.
False professions abound in 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.