The Bible does teach that this will happen, the coming together of Christians putting doctrine aside will be the down fall of many, just to come together, that is what is happening in our world today.
Revelation 13:12
And he exerciseth all the power of the first beast before him, and causeth the earth and them which dwell therein to worship the first beast, whose deadly wound was healed.
Only "Christians" call on the name of the LORD
Matthew 7 King James Version (KJV)
13 Enter ye in at the strait gate: for wide is the gate, and broad is the way, that leadeth to destruction, and many there be which go in thereat:
14 Because strait is the gate, and narrow is the way, which leadeth unto life, and few there be that find it.
21 Not every one that saith unto me, Lord, Lord, shall enter into the kingdom of heaven; but he that doeth the will of my Father which is in heaven.
22
Many will say to me in that day, Lord, Lord, have we not prophesied in thy name? and in thy name have cast out devils? and in thy name done many wonderful works?
23 And then will I profess unto them, I never knew you: depart from me, ye that work iniquity.
Doctrine matters says the Bible and to put it aside will lead to the destruction of many.
Proverbs 4:2
For I give you good
doctrine,
forsake ye not my law.
Matthew 7:28
And it came to pass, when Jesus had ended these sayings, the people were astonished at his
doctrine:
Matthew 15:9
But in vain they do worship me, teaching for
doctrines the commandments of men.
Matthew 16:12
Then understood they how that he bade them not beware of the leaven of bread, but of the
doctrine of the Pharisees and of the Sadducees.
(can we substitute the words "the fathers of the church", or the "original church" in this statement instead of "Pharisees and of the Sadducees")
Matthew 15:3
But he answered and said unto them, Why do ye also transgress the commandment of God by your
tradition?
Mark 7:9
And he said unto them, Full well ye reject the commandment of God, that ye may keep your own
tradition.
So coming together and denying the doctrines of Jesus Christ we have been warned is not a good thing.
May GOD bless you in your search