I disagree with you regarding Satan's existence, but otherwise you're absolutely right.

Let's suppose that Satan is merely the personification of that which Western civilization finds morally detestable. It is still alarming that growing numbers of people are rallying around that figure. This is different from an edgy teenager saying "Hail Satan," or a band searching for a gimic. The Satanic Temple is an influential group that is devoted to pushing social and political change against broad traditional Christian values.