I believe that anyone who “confesses with their mouth the Lord Jesus and believes in their heart” is saved. I don’t care what label you hang on them.
They are your brother or sister in Christ, if you, too, have like faith.
"If only the early church had known this, they could have avoided all those conflicts with the Arians, Nestorians, Eutychians, etc. Determining who is in or out of the Church would have been as simple as saying: "Are you for Jesus or against him?". All the heretics would have answered "Yes", and then the Catholics and the heretics would all have been one big happy family."
What you have done is eliminate the very concept of 'heresy'. According to your position, it does not matter what a person believes, as long as he or she "confesses with their mouth the Lord Jesus and believes in their heart".
-A8