The way I understand it, no God-loving Christian with a proper amount of faith (that of a mustard seed, for all those who attended sunday school
) should ever declare that someone is or is not definitively going to hell.
People who claim to be Christian and pass judgement on their neighbor put themselves in a position higher than God, the greatest of the sins. It is not a loving thing to say, and they have neither the power nor the understanding to say it.

People who claim to be Christian and pass judgement on their neighbor put themselves in a position higher than God, the greatest of the sins. It is not a loving thing to say, and they have neither the power nor the understanding to say it.
". . . let the atheists themselves choose a god. They will find only one divinity who ever uttered their isolation; only one religion in which God seemed for an instant to be an atheist." -G. K. Chesterton