Okay, I'll bite!
Speaking as a Wiccan and as a teacher of Wicca, I don't find the site as offensive as I find it ignorant. It's actually pretty funny and very obviously there as a con to make money.
The "King of the Witches" crack is aimed at Alex Saunders, a disciple of Gardner who went on to form his own version of the Craft. He referred to himself as "the King of the Witches," a statement astonishing in light of Wicca's overtly feminist leanings. I mean . . . who elected HIM?
I think the only real problem I have with the site is the fact that much of his language suggests that his version is THE version of witchcraft. If you wanna be a witch, c'mon down! Buy my tapes! This is the real McCoy! Accept no imitations! But wait! There's more! . . .
It might catch a few young-uns interested in the Craft, which is a shame. Most will be put off by his blatant commercialism and self-serving nonsense, however, or by the sheer cheesiness of it all. The Craft is a field where there are many charlatans, con-artists, and predators in it either for money or for free-and-easy sex, and is definitely one where caveat emptor rules!