@vienne
They don't reject it. They see it differently than you do.... Does it disqualify them as Christians? Christianity has been very diverse since Paul's day. God will determine who and what he accepts. That's not up to us.
You sound like this is some sort of Russian Roulette game. God's word tells us exactly all we need to know. Without the NC we are all "condemned already". Mt. 26: 27-28 is perfectly clear that it is "for the forgiveness of sins".
This is what Christians are looking for. To say otherwise is an impossibility, like a Muslim who worships Buddah, or a Christian who worships Satan, it can't logically exist. There is no such thing as a Christian outside of the NC "for the forgiveness of sins". That is what Jesus came to delive to man as our kinsman redeemer.