From the article...

I’ve written before about my thoughts on atheists who support the current version of the Republican Party. I don’t think it makes sense to claim you’re logical and rational while supporting a party that promotes conspiracy theories and bigotry.

I also don’t think it’s a strategic or useful kind of activism to attend an event like CPAC. Unlike purchasing a booth at, say, a Flat Earth conference where your entire goal is to convince attendees they’re wrong, the atheists going to CPAC support the Republican Party’s policies. They’re not going to argue people out of their delusions; they’re going there because they believe those delusions, too… minus one of them.