I find, in Scripure, that only Paul seems to have concerned himself with the different churches' variations of belief.
Personally, I hand over a Bible with "words of Christ in Red" and tell members of various denominations "If we agree about these words in red, all else is politics."
As cougan points out; the church is the body of believers.
Acts 7:48 and 17:24
"God that made the world and all things therein, seeing that he is Lord of heaven and earth, dwelleth not in temples made with hands; "
The buildings, sectarian trappings, various seminaries' certificates:
are of Man, not of God.
All this denominational divisiveness is political.
In my opinion.
"People who want to share their religious views with you almost never want you to share yours with them."
Dave Barry
"SCRIPTURES, n. The sacred books of our holy religion,
as distinguished from the false and profane writings on which all other faiths are based.
The Devil's Dictionary" (Ambrose Bierce)
"I distrust those people who know so well what God wants them to do, because I notice that it always coincides with their own desires."
Susan B. Anthony
How many believe that only their own sect will be on Christ's right hand on Judgement Day?