As usual, you have misunderstood the scriptures, and built a teaching on a false premise.
Some study is in order here.
The problem with the Pharisees was that they took the 'spirit of the law' too far. They believed that the key to doing God's will was to be found in understanding and fully obeying God's commands. This is the easiest way to tell a Pharisee - someone who emphasises obedience. The easiest way to identify a Christian is - someone who emphasises faith. The Pharisees agreed on the full and exact detail of how the law should be kept.