Always there have been real followers of Jesus who only worshipped his One God, the God of Israel. Many centuries they worked and preached behind closed doors, avoiding persecution and death on the balefire. In fear of the stake for centuries the real followers of God baptised people in their faith, not demanding to be part of one or another church but being part of the Body of Christ.
Looking at what the Bible says about the God of gods Who is not a man, having no limits, being from begin to end unchangeable.
The Bible show us The Being Who makes us able to be a being. The collection of 66 books focus on That Most High Being without Whom no being or existence is possible. The Words of God are there to mould or form each creature of God. By allowing that Word of God to form us we can become reconstituted or 'made anew' by the Former God.
We can look at the biblical authors as Witnesses for Jehovah God, the divine Creator of many universes, as people who were called to testify before humankind and in several occasions were even willing to give up their life for what they considered to be the truth.