It's impossible for morals to exist without religion because internal struggle is a byproduct of external lighting. This lighting is provided by religion - Just think about it. The past is a unfinished book with graffiti inside - this graffiti is only seen if you have light. And the eraser to remove that graffiti is necessary for the finding of the graffiti to be relevant.
Your argument does not make any sense. Objective morals do not exist. Religion was created by man, therefore man created moral. An atheist can be just as moral as a christian. Someone who has never even heard of religion can be just as moral as a religious person. There was a time before religion. Did morals not exist during this time? Morals are created by society and man. Religion just presents rules and orders, not morals.
Well first off I am not doing this to win or lose, I am looking for a intellectual conversation in which we can both learn. You also have not provided sources and your argument still does not make sense.
Your entire argument is flawed due to the fact that you believe morals are an objective truth that exist. This is not the case and their is no evidence for this at all. Morals are always changing and they differ based on how society changes. Morals are created by man in order to serve an agenda. Religion does not provide morals that can be followed today or that provide positive outcomes.