Calvinism, and the so-called "Five Points of Calvinism", are supposed to be from John Calvin, otherwise these terms are wrongly used.
Here are some comments by John Calvin, from his own commentaries, on the extent of the Death of the Lord Jesus Christ, which clearly shows that Jesus did not die for the "elect" only, as some who use the term "Calvinist", would argue.
Mark 14:24
“Which is shed for many. By the word many he means not a part of the world only, but the whole human race”
John 1:29
“Who taketh away the sin of the world. He uses the word sin in the singular number, for any kind of iniquity; as if he had said, that every kind of unrighteousness which alienates men from God is taken away by Christ. And when he says, the sin Of The World, he extends this favor indiscriminately to the whole human race; that the Jews might not think that he had been sent to them alone. But hence we infer that the whole world is involved in the same condemnation; and that as all men without exception are guilty of unrighteousness before God, they need to be reconciled to him. John the Baptist, therefore, by speaking generally of the sin of the world, intended to impress upon us the conviction of our own misery, and to exhort us to seek the remedy. Now our duty is, to embrace the benefit which is offered to all, that each of us may be convinced that there is nothing to hinder him from obtaining reconciliation in Christ, provided that he comes to him by the guidance of faith.”
John 3:16
“That whosoever believeth on him may not perish. It is a remarkable commendation of faith, that it frees us from everlasting destruction. For he intended expressly to state that, though we appear to have been born to death, undoubted deliverance is offered to us by the faith of Christ; and, therefore, that we ought not to fear death, which otherwise hangs over us. And he has employed the universal term whosoever, both to invite all indiscriminately to partake of life, and to cut off every excuse from unbelievers. Such is also the import of the term World, which he formerly used; for though nothing will be found in the world that is worthy of the favor of God, yet he shows himself to be reconciled to the whole world, when he invites all men without exception to the faith of Christ, which is nothing else than an entrance into life”
Romans 5:18
“He makes this favor common to all, because it is propounded to all, and not because it is in reality extended to all; for though Christ suffered for the sins of the whole world, and is offered through God's benignity indiscriminately to all, yet all do not receive him”
Colossians 1:14
" For, unquestionably, when God remits our transgressions, he exempts us from condemnation to eternal death. This is our liberty, this our glorying in the face of death — that our sins are not imputed to us. He says that this redemption was procured through the blood of Christ, for by the sacrifice of his death all the sins of the world have been expiated"
Conclusive evidence from the writings of John Calvin, that he did NOT believe in the heresy known as "Limited Atonement", or "Particular Redemption", etc. In fact, Calvin's comment on Mark, is connected with the Lord's Supper, where Judas was present, and did himself take the bread and wine, which represents the Body and Blood of Jesus Christ!