“Are you so dense that you do not know there is a difference between persecution and punishment?”
Are you do dense that you do not know there is a difference between suffering and punishment? Punishment is suffering but not all suffering is punishment. Every parent I know would suffer in the place of their sick children. None of them would consider it punishment from anyone.
“The catholic notion of purgatory is heretical at its core because it is adding onto what Jesus said was finished on the cross, namely God in His Son atoning far All sin.”
To use your sort of words: “Are you so dense that you don’t know the doctrine you’re attacking DOES NOT in any way violate the idea that Jesus’ atoning sacrifice was finished on the cross and works for ALL sin?” Purgatory ONLY WORKS because of Christ’s atonement. It is powered by his grace.
I believe you have already been told that the grace you are touting is not God’s Grace, for God’s Grace is the source of justification, making those justified innocent then before the Lord. The Bible clearly illustrates this is an instantaneous event (Pentecost and the house of Cornelius) followed by God’s Life indwelling the justified, so purgatory is not a place the innocent/justified would be. The grace you are peddling in purgatory is a wickedness whose source would be the wicked one.