He hates it so much that in the Book fo Galatians he repremanded this church for their "legalism" witch did noting to change the heart of the believer. Jesus came to set us free from "the law of sin and death" (Rom. 8:1-3), and if legalism was pleasing to God, then everything Jesus taught, did and sacrificed with His life on the cross, would be for nothing. It would be a total waste, as The Gospel of Good News, is a gospel of salvation from what could never win points with God, and that was, the "self-righteousness" of works of the flesh. Trying to make the mark or gain acceptance with God through works of the flesh, never suffice - never. It is the heart God wants. He wants your love and a relationship with Him, and religion as practiced in the Old Testament under the law of Moses - The 10 Commandments, never accomplished this
The ritual practrices of religion as understood vividly with the Old Testament practices, were nailed to the cross the day Jesus was crucified, and Grace and Mercy have rulled ever since. It is a simple message we call, The Gospel of Christ or The Good News. It is so simple that the some people still think they have to work with self-efforts to gain God's approval. It is so simple that many who hear the message of grace and salvation, still refuse to receive such a great gift, feel they need to somehow come to God as perfect before He will accept them. Well, this is simply not true. He loves you as you are, but He does want your heart and a relationship with you.
The definition of religion in this article, can be summed up with, rituals and beliefs of a superhuman power, but the authentic Christian and follower of Christ who does believe in a Supreme God, is not religious in the sense of religious mandates supposedly winning points with God and as Karma is said to do. Authentic Christianity is different in that it is a relationship with the living breathing God of Creation, and not a loyalty to rules and laws that do nothing but reveal just how sinful mankind really is.
Definitions of words are often revised as our culture changes, and we are changing culturally. If you go to the website, religious tolerance.org and search definition of "religion," I believe this site puts this into perspective well.