Interesting take...I’ve never equated Pharisee to Jew (though I knew they were Israelites).
I always equated them with people who followed the letter rather than the spirit of the law and/or felt themselves better than others for sticking to the detail while missing the forest for the trees.
Jesus also criticized them for putting their man made tradition above the law of God. This is why he quoted Isaiah 29.13 when he condemned them.