Then all men should be able to repent and be saved, but choose not to. It's their choice, not God's. He chose to offer. They refused. Our cooperation is required. God won't drag the unwilling to Him.
All men ARE able.
They are not WILLING. They are given a choice and they reject it.
I send you to Santa Anita and say to you, “Bet the #1 horse in the 5th race. Sure winner.” Then someone tells you I am a crazy old loon, and you are inclined against me. You get there and say, “That crazy old loon doesn’t know horses any better than I know quantum mechanics; I’m doing what I want.”
The #1 in the 5th wins. You were told, but you didn’t do it. Why? You trusted your own judgment more than mine. It was STILL your choice.