Hidan from Akatsuki (deceased)

Hidan hails from Yugakure (the Village Hidden Amongst Hot Springs), the village purported to have forgotten war.

Even as the Great Wars disappeared from the world and the Hidden Villages were scaled back as military powers, those with an abundance of nature and tourist resources gained positive position in the new times. Hidan, who had lived as a shinobi constantly starved for strife, grew frustrated and discontent with this new pacifism, eventually directing his feelings at the village itself.

It was inevitable that the newly found religion of Jashin would set its eyes on him.
Thou shalt massacre thy neighbor.

The religions teachings would prove be abundant with elements that affirmed Hidan’s own desires.

Ah okay, I did find the thing about Hidan’s immortality. The thing earlier about him being a successful human experiment using the Jashin religion’s forbidden jutsu. If he doesn’t continue killing people he loses his immortality.

In that case he’s probably long dead since I doubt he’s killed anyone down in that hole