Some people worship church, thinking that they are worshiping God. Worship of anything other than God Himself is idolatry.
The woman at the well in Sychar brought up to Jesus a discrepancy between Samaritan worship and Jewish worship: The Samaritans worshiped at their mountain and the Jews worshiped at Mount Zion. Jesus replied that the time had come for the issue of worship’s place to be rendered obsolete. Thus He said that “neither in this mountain nor in Jerusalem shall you worship.” How then do people today say that having a place of worship is important?
Jesus did not die so that Old Testament rituals could be replaced with New Testament rituals. What would be the point of that? Rather, Old Testament worship rituals were to be replaced with sacrificial living (Romans 12:1), doing good, and sharing (Hebrews 13:16). Worship that had previously been focused on festivals and events would now be expressed through all our waking hours as we lived before the invisible Savior God.
By making worship something we do when we go to a designated place, we commit the sin of idolatry for we have reduced God to a time and place. All idolatry creates idols or relics that become the objects of our devotion. God wants to be the constant object of our devotion and it demeans Him to relegate our worship to representations of Him.
To say, as some do, that one cannot live a life of worship pleasing to God outside of a church context is to instruct people to place church on a level with God. Idol worship always makes people forget about the omnipresent God. This is why God always condemns it. It is contrary to truth. God allowed the Israelites to have a tabernacle, a temple, and related furniture and utensils of worship, but only on a temporary basis until an eternal and spiritual administration could be put in place. Now that the eternal administration of the kingdom of God has been established, all that temporary equipment is obsolete. It memory is useful as types and shadows of Christ and His kingdom, but to set up our own houses of worship, furniture, and utensils in its place is as much idolatry as if the Jews were to rebuild the temple in Jerusalem and start sacrificing animals again.