Okay - the article is from that bastion of liberal thought (ha!) "The National Review," but that doesn't mean that it is not worth consideration. However, just as the author warns against absolutism and unintended consequences in the "Blue Dot" campaign, we should read his article with the same eye.
Nonetheless, if we want to claim that our minds are open, we have to listen to all views. That is kind of what "an open mind" means.