Limited Atonement vs. Romans 14:15,23

Romans 14:15,23 reads But if thy brother be grieved with thy meat, … Destroy not him with thy meat, for whom Christ died. … he that doubteth is [condemned] if he eat, because he eateth not of faith …“Condemned” in this passage is translated from the same Greek word as “destroy” in Matthew 10:28b: but rather fear him which is able to destroy both soul and body in [everlasting punishment].This is the same Greek word as “condemned” in Mark 16:16: He that believeth and is baptized shall be saved; but he that believeth not shall be condemned.There is no stronger word to mean spiritually lost than “condemned.”So Romans 14:15,23 teaches that some for whom Christ died will be destroyed, that is, condemned.This contradicts John Calvin’s “limited atonement” position that all for whom Christ died will be saved.Conclusion: Christ's atonement is not limited to the saved/elect.Second conclusion: The doctrine of "once saved always saved" is not true, because Romans 14:15,23 shows the possibility of a brother in Christ becoming condemned.