The rundown

[Mister Agenda]

Um, the left hand path is otherwise known as Satanism. The belief that you are your own God, is Satanism. Seems like you have unwittingly became a Satanist, which as it happens is actually the intention of many atheist promulgators.

I suspect he intended 'the left hand path' ironically. In any case, 'the left hand path' refers to occultism connected to breaking taboos and moral conventions. Atheistic Satanism merely regards Satan as symbolic of certain human traits. The atheistic Satanic Temple lacks the strain of self-deification and 'might makes right' attitude of LaVeyan Satanism and their practices seem to be faux occultism, at best...possibly parody.

I think the LaVeyan tendency to self-deify is misdirected and banal, and I certainly don't encourage it. The Satanic Temple seems more about making certain points about separation of religion and state in a satirical way. Especially the point that inroads by religion into government would have to include them.