One question is:
What part of the Bible do I read to get a Calvinistic understanding? Is there even one complete chapter that outlines Calvinism as it is taught today? I don't see it, and it hasn't been presented.
Calvinism, as it is presented, is a patchwork quilt of verses picked from here and there to from an opinion of man.
Another issue is the source of what is called Calvinism. There are some Calvinists who will give a true account of where Calvinism came from. Spurgeon knew, and Calvin knew, but it appears that most Calvinists today don't have a clue.
The author of what is known today as Calvinism is Augustine.
Boettner has not been refuted as far as I know. His writing on the source of Calvinism is an honest appraisal, but not widely known. It's too bad that this group in not known as the Disciples of Augustine.
The Reformed Doctrine Of Predestination
By Loraine Boettner D.D.a
http://www.ccel.org/b/boettner/predest/28.htm
(edit - the link does not work, unfortunately. I will try to locate it)
http://www.ccel.org/ccel/boettner/predest.vii.ii.html
1. Before the Reformation
It may occasion some surprise to discover that the doctrine of Predestination was not made a matter of special study until near the end of the fourth century.
The earlier church fathers placed chief emphasis on good works such as faith, repentance, almsgiving, prayers, submission to baptism, etc., as the basis of salvation. They of course taught that salvation was through Christ; yet they assumed that man had full power to accept or reject the gospel. Some of their writings contain passages in which the sovereignty of God is recognized; yet along side of those are others which teach the absolute freedom of the human will. Since they could not reconcile the two they would have denied the doctrine of Predestination and perhaps also that of God's absolute Foreknowledge. They taught a kind of synergism in which there was a co-operation between grace and free will. It was hard for man to give up the idea that he could work out his own salvation.
But at last, as a result of a long, slow process, he came to the great truth that salvation is a sovereign gift which has been bestowed irrespective of merit; that it was fixed in eternity; and that God is the author in all of its stages. This cardinal truth of Christianity was first clearly seen by Augustine, the great Spirit-filled theologian of the West. In his doctrines of sin and grace, he went far beyond the earlier theologians, taught an unconditional election of grace, and restricted the purposes of redemption to the definite circle of the elect.
It will not be denied by anyone acquainted with Church History that Augustine was an eminently great and good man, and that his labors and writings contributed more to the promotion of sound doctrine and the revival of true religion than did those of any other man between Paul and Luther.