Calvin was an evil man. The context of his times is not relevant when he had the Bible to guide him.
Then they all were evil men. The French Inquisition begged Calvin for Servetus so they could execute him themselves, because Servetus was teaching radically anti-Trinitarian theology and was totally demonizing infant baptism.
There is plenty of blame to go around, yet we pretend it isn’t so.
And we use it to cause disunity among Christian believers. And that teaches the world that we hate each others’ guts, and that, of course, makes them fall on their knees and praise God and believe in Jesus.
They all want to be part of a movement in which everyone hates everyone elses’ guts.
Just so you understand. America was founded by Calvinists.
The USA is still considered to be the last best hope of mankind. Not least because of the documents of its founders.