Wrong.
Give the atheist credit where credit is due, so that he can see that there is cordiality, and even friendship. If you don't downright make the atheist hostile toward you, there's a chance you may convince the atheist to consider your point of view. When he considers your point, there is a chance he may turn from atheism and be saved.

There is no credit in there.
Atheism is a capital sin and atheists sinners. Punishment for atheism is death as the episode of the "
Golden Calf" explains very clearly.
https://en.wikipedia.org/wiki/Golden_calfHow long are you going with making us loosing blood in a fight that could be more easily won?
"
Thank You" and best regards.
:-|