They say Adam is "The Federal Head" of the entire race. Just as righteousness is imputed to those believing, so Adam's sin is imputed to those who do not believe, even if it is by ignorance. But more, it is inherent. We now are born with a "sin nature." Because we were all constituted in him, when he sinned we all became liable for the penalty due Adam's sin. There's no reparation and no negotiation possible. They believe the wages of sin is ETERNAL death, meaning ceaseless torture for ever. Just to be born human means you deserve to go to hell for ever. Being in Adam, by nature we are "children of wrath." And this idea is supposed to be an example of Divine wisdom? They're bound by something that makes it impossible for them to think about this.