Denominations are literally deamonic entities created by sorcery and magic---and they take the place of Jesus Christ.
They meet every definition of an Idol, and in fact, they are known in Rosicrucian circles as Egregores which is a name that links them to the offspring of the Fallen Angels in the Book of Enoch. These spirits are not alive and have no consciousness but they have the ability to impact the consciousness of those who have joined themselves to it by influencing their worldview...
A Denomination, or really, any corporatized organization, is a marriage covenant between a group of people and an idea or principle. Corporate entities are Godforms and they pretty much have a 'life of their own'.
In addition, the 'structure' and 'legitimacy-granting-authority' are in direct opposition to scripture and in fact, spiritually supplants both Jesus Christ as the 'head' of the organization as well as God as the granting authority. On top of all that you're (the pastor) then signing a legally binding contract or oath that asserts the same... Then you're going to go into that building and teach people not to swear oaths?
I like to view corporate entities as little mini beast-images. Egregores are seen in Bible Prophecy as beasts, most of them are identified as nations and, while they have no life or consciousness of their own, they seem to exist for the sole purpose of making war with each other and thus are responsible for the greatest loss of human life and destruction.
Denominations, like the real beast-nations they're modeled after, only serve themselves and feed upon you.
If you're going to feed something, feed the only organization that is not recognized by any government on earth-The Kingdom of God-The Body of Christ
I'd prefer to go to a non-501c3 that has no denominationally-certified, state-approved, propaganda-doctrine...
The religion of the New World is far more advanced than any of you can imagine. They don't care what god you profess to worship---as long as you worship theirs first... And their gods grant legitimacy to your gods! Oh, but secularism isn't a religion so it's OK! We don't call them vain idols, we call them nations and states and they allow your feeble denominations to exist as long as they play by the rules otherwise they revoke the permit because they are far more powerful than your weak little God of Abraham who has to petition the nations to allow His People legally congregate even though he's supposedly the Author of the Universe...
Don't even get me started on this... Don't even...
All your little denominations named after dead people (necromancy) will be put under His feet