Thank you Vic, for moving the topic to an appropriate venue.
Is Calvinism of the Bible?
Yes. Can you tell me even one petal on the TULIP that isn't based upon Scripture?
Let's see:
Total Depravity
Romans 5:12
Mark 4:11-12
Ephesians 2:1-5
Unconditional Election
Romans 9:10-24
Ephesians 1:4-8
Limited Atonement
John 17:9
Matthew 26:28
Ephesians 5:25
John 6:37
Irresistible Grace
John 6:37
John 6:44
Romans 8:14
1 Peter 5:10
Preservation of the Saints
Romans 8:28-39
Philippians 1:16
John 6:39
Hmmmm, can't come up with one that doesn't have Scripture as it's basis. And, this is just a short list of key verses. One can study these themes in-depth and come up with many other passages that speak to these subjects in the same way that Calvinism teaches.
And here is something to think about. When I was a member of the Orthodox Presbyterian Church and the Presbyterian Church of America (which are about as Calvinistic as they come), we did not study John Calvin or his writings or the work of John Knox or even Charles Spurgeon or R. C. Sproul. We studied the BIBLE. When I left the Calvinistic churches, (because I have come to disagree with their interpretations of the above verses) I was surprised by a number of things. Things like adult Sunday School going through books and preprinted study material instead of just doing Chapter Studies and Theme Studies straight out of Scripture. I was also surprised to find that at none of other churches were there weekly Evangelism classes and door-to-door witnessing.
Now, one can disagree with the interpretations that the Calvinists apply to the above verses. After years of study on these key doctrines, I've come to different conclusions on just about every point exept the preservation of the Saints. (Which differs greatly from "Once saved, always saved".)
But, just because there is disagreement doesn't mean that "Calvinism is not Christianity". There is not one denomination, catechism or systematic theology out there that is 100% correct. The Calvinistic churches that I belonged to were filled with the Spirit and full of loving, Godly people who took their Chrisitanity to heart and were committed to seeking after all of God's truth and committed to sharing God's truth with the world.
Biblereader, if you are truly concerned about your relative, here's an idea. Go to church with him, visit with his congregation and his pastor. Even if you don't agree with their interpretation of the Bible, I think if you go to his church a couple of times, you will find that the services will be very focused on God and the Bible. You might even find that your relative, being so new to Calvinism has become "hyper-Calvinist" in which case, more study and teaching from his pastor and elders will help him come to a better understanding of his new church's doctrines.
Listen, I live deep in the heart of Mormon country. They don't just 'preach a different gospel' they believe in a totally different God and Jesus than what the Bible teaches. Calvinistic churches might have different interpretations that lead to a different view of how the gospel works, but they preach, teach, love and are committed to God the Father, Son and Spirit as the Bible exhorts us to.