Why will God have every right to pour out His wrath?
God will have every right to pour out His wrath because He has accomplished reconciliation for every person who has ever lived, and all anyone must do is believe and appropriate it. He has done everything possible to make salvation as simple as possible so lost humanity can return to Himself.
Les explains that, as far as God is concerned, every person who has ever lived has had reconciliation accomplished, and all they have to do is believe it and appropriate it. That is why God will have every right in the world to pour out His wrath: He has done everything possible to make it as simple as possible so that lost humanity can come back to Himself. The context also points to verse 6, where Paul asks, "God forbid, for then how shall God judge the world?" and repeats that He is going to have every right to. Even Saul of Tarsus, a religious zealot of Judaism, had to be told he was a sinner and undone. Likewise, Paul says the condemnation is just for those who slanderously claim that grace means doing evil so good may come.