If you are talking about Servetus he would have been burned at the stake by catholic authorities too. I’m not excusing what happened in Geneva but both Calvin and Rome recognized Servetus was a heretic. So it’s not like Rome gets a pass for preferring those they disagreed with crispy.Luther and Calvin were very clear about how they came to their OWN conclusions about what scripture said. They were very arrogant, Calvin killed people for disagreeing with him in that cult colony he governed. I’m not following a church created by those men over 1600 years after Christ established his church.