This is a guess, as you know, and doesn't explain Job and Moses and everyone else who knew the Truth in The Bible, including Jesus, as well as, all who speak and teach the Truth since The Bible was completed and lived prior to Calvin.
Many men have written systematic Theologies that state Biblical Truth.
"Doth this offend you?"
Calvin didn't author The Bible.
People have departed from The Bible Teachings of The Truth, long before Calvin.
You just waited until this present era and are confused as to who wrote The Bible.
It sounds to me like God Offends you.
God doesn't say, "everyone knows what they are talking about".
"Doth this offend you?
62 "What if ye shall see the Son of man ascend up where He was before?
63 "It is the spirit that giveth life {quickeneth}; the flesh profited nothing. The words that I speak unto you, they are spirit, and they are life.
64 "But there are some of you that believe not.
…67 "So Jesus asked the Twelve, “Do you want to leave too?”
68 "Simon Peter replied, “Lord, to whom would we go? You have the words of eternal life.
69 "We believe and know that You are the Holy One of God.”…
John 6
If Jesus has the words of eternal life, why do we need words like irresistible grace when there are no words like that in the scriptures? Why do we need words like sovereign grace? Why do we need words like limited atonement, unconditional election, perseverance of the saints, original sin, covenant of grace, the gift of faith, covenant of law, total depravity, or why do we need the word depravity at all? The word sovereignty, not a bible word or concept that God wants to put forth. Why do we need doctrines that teach grace alone, when salvation in the scriptures has words that say that salvation is by "grace" through "faith?" Why do we have less than honest people declaring that faith is a work when the scriptures says words like
"But to him that worketh not, but believeth on him that justifieth the ungodly, his faith is counted for righteousness" thus setting faith and works as contrasts. Are we to think people who make such awkward claims are the smartest people in the room and ones whose teaching we should trust our eternal souls to. And what about infused faith to believe the gospel when the scripture words say in Rom 4 that "16
Therefore it is of faith, that it might be by grace;" the "it in the context being righteousness that the law of God requires when the Calvinists would change the message to"
by grace that it might be by faith" with the perversion they espouse. Calvinism tells us that we have
access to faith by grace when in fact the words of scripture says we have "
access by grace into faith" in Rom 5 where we are told in verse 2 that, "by whom (Jesus Christ) also we have "
access by faith into this grace" wherein we stand, and rejoice in hope of the glory of God, which is just the opposite of the words of the Calvinists.
What is offensive to some of us is that Calvinists thinks it is a badge of intellectual brilliance to teach that people are born with intelligence, reason, and will and can make decisions on anything that involves their futures and their lives with the one exception of whether they will trust the words of scriptures that invites sinners to come to God through faith in Christ and receive eternal life, who is Christ in us in the person of the Holy Spirit, the same Spirit who is in him. What kind of thinking is this? Who, living in the real world and having knowledge of the realities of life and death, could be convinced of such a thing?
These reasons and many others is why I oppose this religion as a false system and understand that it is in existence because it does not accept the words of scriptures and adds to them it's own expressions that changes biblical truths.