True....I stand corrected. Calvinism does try to explain this away....some even saying that God is the ultimate cause of sin.I am sorry but I disagree vehemently. Recall God ordains whatsoever comes to pass but is not the author of sin.
This is an "internally inconsistent" statement from Calvinism's Confession. What does "ordain" mean? To predestine the occurrence. So God predestines our each and every sin, yet is not the author (cause) of our sin.
Hardening does not equate with "passing over." Hardening refers to rendering a person unable to grasp, understand or respond affirmatively to spiritual things. (See soil #1 of Matthew 13) In Romans 11, unbelieving Jews were hardened to facilitate the spread of the Gospel to Gentiles. If the Jews had been already unable to respond, no "hardening" would have been needed. So the concept that original sin rendered humanity unable to seek God and put their faith in Christ, is internally inconsistent with scripture.
There is no problem with the view God is the first to act in the redemption plan of God.
Another inconsistency is affirming salvation by grace while really believing salvation is by perfect law keeping attributed to us.
But Calvinism is really a philosophy. So there will be some internal issues.