Earlier quoted context omitted.
Let's assume, just for laughs, that I know a little history. Many people have been burnt alive, Bruno included, Galileo excluded. Bruno was a singular immolation for multiple heresy's, the Cathari were immolated en masse along with non heretics (for God to sort out) .. but none for claiming the earth traveled about the sun, Bruno (IIRC) made waves for denying actual core beliefs. ( Wikipedia cites Bruno not accepting…
You somehow missed it was the highly educated, clerical class not some illiterate peasants, who burned him at the stake.
Many would argue that the "highly educated, clerical class" of those times represented a rigidly traditional society that punished any who deviated slightly from their norms.