No. I meant nobody. I would never back away from that. I am a Christian, and I do maintain this traditional division between the world as it was before Christ’s incarnation and after, which is what makes it possible to claim what I have claimed in the first place. Had the world after Christ’s coming continued on as it was before, then you would have a point in trying to destroy this distinction to the benefit of Christ-deniers. But Christianity is true, and these other things are not, so it is still the case that nobody worships God without Christ. Those who did so in OT times are evident through the prophets who foretold His coming (as in St. John the Baptist/Forerunner’s assertion that “He who comes after me is preferred before me, for He was before me”), and those who followed Him after that time are those who maintain that connection to the pre-incarnation times. That’s the whole reason we did not follow the heretic Marcion, you know. Because indeed the God of our Fathers and the Father of Jesus Christ is One God, but that says nothing of the Jews, Muslims, or any number of others who may try to claim Him selectively.
There is a reason why our English word ‘heresy’ comes from the Greek word for “choice” or “choosing”, and it was not too long ago in the grand scheme of things that Christians openly referred to Islam as a type of Christian heresy (which is a viewpoint that is also of ancient provenance; see, for instance, John of Damascus’ excellent writings on Islam). The Jews and Muslims and whoever else try to worship God without Christ, and since that is not possible, they fail. So their god is not our God, but it is by their choice, their refusal, that this is the case. Not because there is actually more than one God.