I look at it this way...
the early followers of Jesus were taught by the apostles using the OT scriptures to identify and authenticate Jesus and what He was sent to do. Besides this there was a lot of oral teaching regarding the formation of the church including the organizational structure, doctrines, beliefs etc. In this they formed the church body. As the apostles died others were entrusted to continue on in the ministry. We should hope that as the decades turned into centuries there WAS an unbroken line of people in authority united by LOVE and RESPECT for the Lord Jesus, the gospel message...AND a healthy fear of displeasing the God that they worshipped (integrity and honesty demands it considering WHAT was written and passed down both OT and NT) By the time that the Nicene creed was formulated and the canon was agreed upon there is no reason to believe that LOVE, RESPECT and a healthy fear of God had diminished within the core church.
To deny the orthodox doctrine of the deity of Jesus Christ and the doctrine of the trinity is to call into question the agenda of these most early followers of Jesus Christ and WHO motivated them. That smacks of disrespect and a lack of brotherly love for ALL those who cultivated THE faith.
I can't help but think of the apostle Paul and his willingness to enter into congregations and root out sources of error in God's field. He was completely adverse to accommodating those who would corrupt the gospel message that he was given to preach...anti-Christ's and other gospels (possibly gnostisism?) abounded and he endeavoured to stamp them out with as much (not the same) ferver as he put into stamping out the first christians. That "speaks" to me...that tells me that he was concerned about the truth being administered because the real truth does mean more than prevailing opinion.
The JW, the mormon, and the bahai all have different definitions of WHO Jesus is and WHO God is...these definitions are different from each other and different from the orthodox. If it doesn't make much difference what you believe about the One who saves you, then why would the apostle paul bother to try and correct erroneous BELIEF?...What we believe about God and Jesus IS important...it unites us where differing beliefs have a tendency to cause division.
Moses wasn't allowed by GOD to enter the promised land because of unbelief...to what degree are His modern day representitives willing to accommodate unbelief by the supposed authority of in His name?...will the result fracture more than unify?...WHO motivates the modern agenda and is it the same as the early christian congregation?
I like the scripture about the Master who hired workers for a denari and the same amount was paid to each regardless of how long they worked...the above mentioned from OTHER faiths still have opportunity to labour for the Master and receive as much for an hours work as those who have worked all day :)
love michelle