Am I an A-Thiest?

Since this word turns up so often at AC, I googled it. Seems, as if athiest and thiest are both used regularly by - well, mostly - theists...
Is this just another form of this g_d thing?
I thought there could be some kind of more subtle meaning, so I spend nearly half an hour finding it.
Thiest seems to be a Dutch boy name.
Fritz Thiest was a member of the communist party in Bremerhaven
Giselbert de Thiest signed a treaty in the 12th century
Amy Thiest makes porn movies...
So maybe I should insist on not being A.Thiest?
Then again: there should be pretty many of the raytards being anti-Thiest...

Honestly: Is it so difficult to spell theist right (either pro or anti)? -ist is a common ending in English, too, AFAIK.
I really doubt it honors their god if they can't even spell him correctly.