Those who truly seek God will be able to find him anywhere. The requirement is not one of geographical location or outward form. The requirement for seeking God is that we come in spirit and in truth. False worship of God is like plastic. It's a convincing imitation, but not the real thing.
False worship leaves things out.
It is selective. The Samaritans only accepted part of Scripture, the first five books of the Bible called the Pentateuch. They rejected the prophets and the Psalms. The Jews thought they accepted all of Scripture, but they too had a very selective interpretation, depending on their vested interests at the time. It is very dangerous to accept only what we want and disregard the rest.