What one believes their God to be is usually reflected in ones life.
Example, Muslims believe that Allah is a waring God, "Kill the infidels". So this is reflected in many of their lives.
If you believe that God saves some people and then for no reason damns the rest to hell, then you have an unjust, unmerciful God. This is what Calvinist want us to believe. There is a serious problem with believing that God would do such a thing as this.
1. The Bible does not teach that this is the nature and character of God. The Bible teaches that God is just and merciful to all of humanity. There is not one scripture that says God has predestinated anyone to heaven or to hell. "God so loves the world that he gives his only begotten Son" is a true picture of the character and nature of God. God gives. He does not damn.
2. Salvation always has been by faith. "Abraham believed God and it was accounted to him for righteousness" Romans 4:3. What this scripture is really saying is that Abraham had confidence and believed in God's promise that he would provide him with a savior. He trusted God. How in the world can you trust in the God of Calvinism who damns people to hell for no reason. Answer, you can't.
HOW THE GOSPEL REFUTES CALVINISM
The Gospel refutes the doctrine of Calvinism and predestinationism. In the Gospel Jesus comes into the world as the savior of all of humanity, John 12:47. His mission is to provide salvation for all of humanity, not some of humanity, 1 John 2:2. This is why the scripture says.. "God so loves the world". God loves his creation and especially the crown of his creation, humanity. Does it not make sense that if God loves the world that he would provide salvation for the whole world?
In the Gospel Jesus reconciles humanity and the whole world unto God by his doing and his dying, 2 Corinthians 5:18, 19. No one is damned to hell. They are reconciled to God, even sinners and evil doers, Colossians 1:21, are reconciled to God. God now sees all of humanity in his Son Jesus Christ, Colossians 1:20. This is how God has made salvation available to all. However, THIS SALVATION AND RECONCILIATION IS NOT YOURS IF YOU DON"T RECEIVE IT. God imposes salvation on no one. If you want to be saved you will have to ask Christ to save you, "Whosoever that shall call upon the name of the Lord shall be saved" Romans 10:13.