One reason she mentions is that many atheists feel religion is not just wrong, but also harmful. And we need to point that out.
Another is the ongoing anti-atheist bigotry we have to deal with:
Parents are denied custody of their children for being atheists; people are harassed and and their homes vandalized by their neighbors for being atheists; teachers are suspended for being atheists; teenagers are harassed and suspended from school for being atheists; politicians whip up anti-atheist fear to try to get elected. (And that’s just in the U.S. I’m not even talking about parts of the world where atheism is a crime punishable by imprisonment or death.)
You owe it to yourself to read the piece. Don’t let anyone put you down by asking why you talk about or think about atheism all the time. We have plenty of reasons to keep it at the forefronts of our minds.
(Thanks to Shaun for the link!)