This seems to be the part you don't understand. Historically (going back to the early days of the Church), one was a Christian who affirmed these beliefs about God. One might be a Christian in error if one had other doctrines wrong, but one was still a Christian. Traditionally, the litmus test for Christianity was what one believed about God--nothing else.
This is just not true -
Pharisees of all people held the highest standard of holiness AND
accepting and claiming the very beliefs from the Law and the Prophets.
What was Jesus' response to them?
Their claims were there, but their hearts were somewhere else &
their spirit was false.
And the main test was the
fruit they produced which was contrary
to God.
The same is true today. A church can only make some standard
statements to accept - it by no means suggests that everyone
who claims to accept them is born again.
Jesus came to relay that fruit needs to be inspected so that we
don't get decieved by the false. He didn't say "if they claim to
believe this, that & the other, they ARE of Me".
"why do you say Lord, Lord, and not DO what I say?" said Jesus.
Mat. 7:21-23 "MANY will say Lord, Lord....... and I will tell them
..... I never knew you".
I can quote lists of what we're to watch for - and how many who
claim things aren't really believers.
This is why Paul taught church discipline - when congregants were
openly sinning and living in rebellion or spreading heresy, they were put out until they repented.
Now CF is not a church - but
the principle is that we have sin
openly flaunted and promoted as righteous (I"m including all forms
of abortion) and it's embraced & protected here.
THen I'm told to smile and unite with that as my family.
Sorry, it's not going to happen. I won't even bother to go into
how the Bible is annihilated here.
The churches may have held creeds - and expected beliefs, but
they ALSO carried out church discipline and people were dealt
with when sin and heresy crept in. (which is rarely dealt with
today in the church).
So it remains that these sins and rejection of the scriptures
are part of the foundation that CF wants to call Christian and
therefore, RIGHT to believe it and promote it as Christian.
(My bible says something else about that).
As a Christian, I don't have to accept those things and in fact,
I'm called to refute them.
Lastly, I think we should remember that even the demons
believe and shudder.