"But in vain they worship me, teaching for doctrines the commandments of men." Matt: 15:9
There is much disagreement in the laws (commandments) that man makes and the laws (commandments) of God. Maybe this verse will explain is better when Jesus said "Thus have ye made the commandment of God of none effect by your tradition" Matt: 15:6
Jesus called them "hypocrites" because they worshiped him with their words but not in their hearts, teaching their ways, which are in oppostion to GOD's law, rather than teaching the commandments of GOD. Therefore even if you proclaim to worship GOD it is ineffective or worthless if you are following the laws are traditions of man that are in disagreement with the laws are commandments of GOD.
When you overlook the truth and allow corruption to exist just so you don't have to face or confront dishonestly within the system. But everythiny hidden will be revealed.