Terry
You have gone very quiet on this thread.
Are you conceding that, regardless of other lines of arguement you may have for the non-existence of God, this one is actually very weak if not fatally flawed?
Eternity before creation does not mean that an Eternal Being could not exist.
It means that an Eternal Being possibly hasn't created eternally.
However there is a further possibility.
An action performed in eternity or an "eternally performed" action.
For example if you asked an Eternal Being what it's first thought was, could it reply "I have always thought"
And if you asked an Eternal Being what it's first action was, could it reply "I have always been active"
If that is possible then you're initial post doesn't hold any water.