What a ridiculous argument, why would God have to be long-suffering toward anyone when he could instantly regenerate them and make them irresistibly willing to repent?
You've gotta throw your brain in the trash to believe this silliness.
1 Cor. 2:14?
The elect come through the non-elect. Everything about the non-elect have an impact upon the elect and so God is longsuffering to the non-elect withholding his wrath for our sakes. Just think it though and you can see it is absolutely necessary, completely vital that God must be longsuffering to the non-elect or otherwise he would destroy the elect with them. Just think it through.