I already understand that you are an atheist. But are you sure that your mother, grandmother, great-grandmother, father, grandfather, and children won't end up on his list for "freezing"?
There are people who are beyond reason and only understand the language of force, and it's useless to explain anything to them.
Let him say this to the face of some master of sports in combat sambo who himself believes in God, and whose parents, grandmother, and grandfather also believe! He'll immediately swallow his words. And all his arrogance will turn into zero.
P.S. As for the "spitting out of teeth," it's not original and, moreover, has been widely practiced by "fighters for faith" since ancient times, only then it's not about teeth, but about hundreds of thousands of lives lost, people who think differently and believe in a different god.