Lol then youve never talked to an actual Jashinist until now.
And the modern translations can mean evil god or wicked heart, but it has archaic meanings too. (Waiting for my friend to translate it and get back to me on that, I can let you know when I find out.
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Besides, its certainly a religion. All one needs are followers to make a religion.
This page can give you some information.
[link]