I don't know what sort of alternative reality you're living in to think Atheist don't care about the well being of others and themselves
He didn't go that far yet. He's just implied that any morality atheists exhibit is irrational. It's the same old "rational atheists should conclude that they can do anything they want, so why aren't they rampaging and murdering and raping and pillaging?".
I regard anyone who thinks religious belief is required for moral behavior with some concern. But they are
a priori wrong, atheists in general are moral. That is an observed fact, so the interesting question is "why?", not "why are you doing atheism wrong? ".