The doctrine of Calvinism is so named because of the heavy influence John Calvin, a French reformationist, had upon the idea's of the sovereignty of God. This theology assumes that God exercises complete and direct control over all things. Those who adhere to such a theology believe that all things good and evil are by divine decree the way they are. The homosexual, murder, covenant breaker, etc. are so because good made them that way. Conversely the pure, the righteous, and the just are without moral choice but instead are simply made to be such by God.
While we ready acknowledge that God rules in the affairs in men, that he is supreme in intellect, power, and purpose it does not stand to reason that God would create individuals evil and then punishing them for being no more than what God made them.
All of this addresses what the Calvinist views as the sovereignty of God. The Bible certainly teaches that God is sovereign. To see this we can consider the person of Esther. Ether was a Jewish woman who lived during the time of Israel's captivity. Ether cousin, Mordecai, raised her after the death our her parents. Mordecai, being a Jew and fearing God, refuses to bow down and pay reverence to one of the Gentile rulers named Haman. This infuriates Haman to the point that he "...sought to destroy all the Jews that were throughout the whole kingdom of Ahasuerus, even the people of Mordecai." (Esther 3:6b) This means that now Haman, one of authority (cf. 3:1), is set on completely euthanizing the Jewish populace. Haman is successful in convincing the king that indeed the Jewish people should be slain. Mordecai hears of the kings decree and tells Esther that she must go to the king and try to convince him not to do this. Esther is reluctant to go before the king without having been summoned. All the king's servants, and the people of the king's provinces, do know, that whosoever, whether man or woman, shall come unto the king into the inner court, who is not called, there is one law for him, that he be put to death, except those to whom the king shall hold out the golden sceptre, that he may live: (Esther 4:11). Mordecai's response to this statement is, "For if thou altogether holdest thy peace at this time, then will relief and deliverance arise to the Jews from another place, but thou and thy father's house will perish: and who knoweth whether thou art not come to the kingdom for such a time as this?" (Esther 4:14). Notice what Mordecai is saying here. God is going to deliver his people! There was no doubt in Mordecai's mind that God was in control. He was going to bring about His desired end. However He was going to accomplish that without violating Esther's free will. Esther was able to choose to help, very likely she was placed there for that very reason, but she could also choose to do nothing. God was in control, He is sovereign, but that does not mean that he made us like programmable robots that can only do what God predetermine we would do. Esther had a choice, the sovereignty of God did not change that and you have a choice too.
The tenants of Calvinism can be summed up in five points. It is our purpose to show that each point is not supported by scriptures and thus constitute a false doctrine. To disprove one is to disprove all in actuality as they stand and fall together.