Face the facts. You are dead wrong. You need to do some real in-depth reading of the life of Calvin by a legitimate scholar --not your normal poisonous websites.
You need to read samples from his sermons, lectures, commentaries and letters. Do not feed yourself on hatred and utterly false accounts of his life. Act Christianly.
This is what he wrote to Servetus :
"I neither hate you nor despise you; nor do I wish to persecute you; but I would be as hard as iron when I behold you insulting sound doctrine with so great audacity."
Matt 15:8 - "This people draweth nigh unto me with their mouth, and honoureth me with their lips; but their heart is far from me".
Now the Apostle Paul came up against true heretics, but did he devise ways to put them to death?
Why would I even want to listen to Calvin's sermons knowing he did not practice what he preached. Did Calvin preach on Matt 5:44, "But I say unto you, Love your enemies, bless them that curse you, do good to them that hate you, and pray for them which despitefully use you, and persecute you;" ??? And what happens when one follows Jesus' command here? "That ye may be the children of your Father which is in heaven: for he maketh his sun to rise on the evil and on the good, and sendeth rain on the just and on the unjust." So then was Calvin a child of the Father? What of his true heart towards those who he disagreed with? Did Calvin have an understanding of what it meant to be born of God? Did he not have the Holy Spirit in him saying "don't be consenting to the death of one of My children". Did he miss that passage in the Holy Script?