Sympathy for the Devil? (The Rolling Stones) LOL
Yes, if even one soul is in eternal conscious torment, God has failed and sin is the eternal victor. And the price God/Christ paid was not sufficient to solve the sin issue completely.
Damnationism believes that the sin problem was just swept under the rug to be forgotten about. Creating the elephant in the room of heaven. Where's Charlie? (don't ask)
Damnationists believe that Charlie put himself there. Even though God created hell and predestined him to it.
I have good news to share. What God/Christ did was indeed sufficient.
Romans 5:18-19
Consequently, just as one trespass resulted in condemnation for all people,
so also one righteous act resulted in justification and life for all people.
19 For just as through the disobedience of the one man the many were made sinners,
so also through the obedience of the one man the many will be made righteous.
On the contrary, God is that much above us --i.e. infinitely and in every way-- that the existence of any of us resembles simple mechanical fact by comparison, but you want to endow us with an equal state of existence as he possesses. It is only because of his plan and use for us that we are of any worth. You think you can stand up to him and call him to account? "Who are you, oh man, to talk back to God?"
You don't even have honest questions for him --your questions presume the universe revolves around YOU. (That's ok --none of us have quite honest questions for him).
You quote Scripture for what --to use against us, who believe Scripture? I will quote your Romans 5 reference again, including your emphasis: verses 18,19
"
Consequently, just as one trespass resulted in condemnation for all people,
so also
one righteous act resulted in justification and life for all people.
19 For just as through the disobedience of the one man the many were made sinners,
so also
through the obedience of the one man the many will be made righteous.
19 For just as through the disobedience of the one man the many were made sinners,
so also
through the obedience of the one man the many will be made righteous."
"All" and "the many" are to show the scope of the point --not the point itself. That is to say, "If anybody at all is to be made righteous, it is through the obedience of the one man." as it says elsewhere, "There is one God and one mediator --the man Christ Jesus." Likewise, "As in Adam all die, so in Christ shall all be made alive" is the same sort of construction: In the same way all die in Adam, so nobody can be made alive but by Christ.
Again: "Consequently, just as one trespass resulted in condemnation for all people, so also one righteous act resulted in justification and life for all people. 19 For just as through the disobedience of the one man the many were made sinners, so also through the obedience of the one man the many will be made righteous." Nobody is outside the principle of justice, of death for sin; likewise, nobody is outside the principle of justification and life by the the righteous act of Christ.
You want to know where the authority to treat these verses comes from, instead of reading them as you do, by themselves, out of context? It comes from the rest of Scripture. Where do you get any authority to read them as stand-alone verses? Paul talks in whole discourses of rhetoric --not in stand alone wise sayings and theological statements.