[nine_k]

Yes, the predestination. It removes from humans any agency in their own salvation, and any action of consequence in their lives. Everything is predetermined, the whole world is just a mechanical puppet show.

It's an internally consistent view of the world. But it turns all the biblical events where humans appear to have agency into just silly scripted scenes, and it also turns the passion and self-sacrifice of Christ another scripted scene (with the Gethsemane episode thrown in for sadistic melodrama, apparently).

I'd say that (strict) Calvinism is the least Christian of the various sects that have attained mainstream success. Paradoxically, it produced some very sober and ultimately successful approaches to the earthly life.