This is a dumb article, and this paragraph is a good illustration of why.
A Christian, I hate it when non-Christians try to tell me what my religion is about. Usually it's because they oversimplify the faith by cherry-picking the aspects of it that suit their worldview the most.
I suspect that atheists feel the same way about someone telling them what they should or should not believe, or should or should not care about. I can think of a host of reasons why an atheist would "care" about these things, even if they consider their physical death final.
Why is it a dumb article? Christians don't constantly bring suit against atheists, protesting that their beliefs are offensive. Why do atheists so often bring suit against Christians, or spend their lives crusading against religion? I don't suppose his answer accounts for all atheists, but seemingly it accounts for some of them.
We each have our own opinions. And yours is duly noted.