It would do you well to study what the Hebrew word used in Isaiah 1:18 really means. The word "judge" or "discuss" would be more appropriate. But hey, you go right ahead and rely on human reason if you wish.
I think that we have identified the fundamental and unbridgeable point of difference in our views. You adamantly reject any role for reason in matters of Christian faith, while the Catholic tradition that I follow embraces reason as a means for understanding Scripture and the Christian faith.
You are trying to vary Scripture in order to dismiss passages that conflict with your views. And of course you are appealing to reason in support of your interpretation.