All right. That's your opinion.
My opinion is, the article is about how the concept of a devil is just implausible, because it leads to absurd conclusions. As in "Did God create the Devil so he could lead us astray?" If that were true, then God created the Devil, then decided to send his son to save us, then decided to let Satan off, for nobody knows what purpose, since Satan was ultimately defeated anyways, 2000 years ago. If you're a Jehovah's witness, you have to add that YHWH will destroy all the bad guys at Armageddon (that is to say, the ones who were led astray by Satan, that creation of, yes, YHWH), will let the Witnesses prove their worth for a thousand years, then will let Satan off again (so he can destroy the humans YHWH loves that much). Does it seem to make sense? It doesn't seem to make sense to me. By extension, yes, the article is a critique of the idea of whether there is a God, at least the kind of God we've been told God is.