More technically, religion is the method of worshiping God.
While it is possible to remain in fellowship while practicing a religion, many fall out of fellowship by placing a religion before God.
The Adversary seeks for others to worship him as a substitute for God, so their are many false religions, such as Islam.
It isn’t sinful to be religious, but many who are religious, never have fellowship with God. Religion to those people becomes a counterfeit substitute for that relationship.
Sorry, can’t agree with your definition.
It assumes there is one God. While I personally agree, there are and have been many religions with a different POV.
There are and have been religions with many gods, and religions with no gods.
I personally consider them false religions, but they’re false religions, not non-religions.
I also do not want my, or anybody else’s beliefs about religions, incorporated into our legal or constitutional system. Let all the religions, true and false, duke it out in the public square.