Are the Inquisitors Really Nervous About What They're Doing?

The first Jesuit who ever became an Inquisitor Robert Bellerman was brought on to Bruno's trial and the thing is that Bruno as a Dominican had been trained in inquisitorial methods so he knew how to do it himself. I think Bellerman was haunted the rest of his life for what he did. There is also a letter that's an eyewitness report of Bruno's execution by burning at the stake alive rather than being discreetly strangled beforehand.