4His_glory,
You would have to ask them whey they call those people heretics.
Pastor Larry,
In my view there are many issues with Calvinism but one seems to be a misunderstanding of the term "grace" as a somewhat gnostic force.
God's "grace" is merely his unmerited favor. It is not some salvific enlightenment power that brings someone closer to salvation or regenerates them enough to believe. Prevenient grace therefore is a mischaracterization of what grace is. Grace is not a power, its God's attitude towards us.
I believe that the protestant undestanding of grace is very tainted by the Roman Catholic system that the reformers were a part of, namely the incremental salvific "grace", or force, spiritual healing energy, or whatever you want to call it that was conveyed via sacraments, indulgences, etc. This type of grace is not found in scripture and shows a faulty theology.
Biblically speaking, in my view, the word of God enlightens the totally lost sinner so that they can respond in faith to the message preached. Conviction comes from the Spirit only through the Word of God. People can resist the Spirit as the scripture clearly states. However, when the lost sinner responds to the Spirit and calls out for salvation, he/she is plunged into the family of God, the "Baptism of the Spirit" if you will. They receive all of the Holy Spirit they are ever going to get at that point.
So, I don't know if I've anwered your question but to me Calvinism/Arminianism is a moot point. Unnecessary. Based on a faulty understanding of grace and other doctrines of the reformation era as they emerged from Catholicism.
Sorry if there are folks here that have identified themselves closely with these doctrines, I'm not trying to attack you personally or offend you.