We are close, And we could actually say, Both of us believe that someone who rejects or denys christ will not get to heaven. (which is why I disagree with you, But will not say you are not my brother.. )
As far as "NEVER" vs "Should" The bible does not say SHOULD it says they were NEVER OF US,, or they would have remained WITH IS..
so I have to go with John on that one.
That verse in I John 2:19 - I assume you mean that verse:
"They went out from us, but they were not of us; for if they had been of us, they would no doubt have continued with us: but they went out, that they might be made manifest that they were not all of us"
I think I agree with you on this: the verse seems to mean that the group of people he is referring to were in the church, but were not actually born again Christians - because they left the church - and all this proved that they were not really born again.
No argument with that interpretation - It seems to me, though, that you are taking this verse and saying that because this was true of the group of people John writes about here - (that they were never born again) that this means that anyone anywhere in any age that seems to leave the faith (or the church, or true Christianity) was not truly born again to start with.
I do not think the text (I John 2:19) says this.
All it says is that the group of people John is writing about were not ever truly born again.
Now I do agree that very often people who seem to have "backslid" or "left the faith" probably never were born again to start with. But I don't see any clear Scriptural text that clearly says that this is always the case.
Thanks for the congenial discussion, EG - I am not sure what I am writing above is the verse you were referring to - so maybe I am trying to answer the wrong question - clarify as needed . . .