The Catholic Encyclopedia states concerning the aforementioned Giordano Bruno:
"Bruno was not condemned for his defence of the Copernican system of astronomy, nor for his doctrine of the plurality of inhabited worlds, but for his theological errors, among which were the following: that Christ was not God but merely an unusually skilful magician, that the Holy Ghost is the soul of the world, that the Devil will be saved, etc. "
Yes, Bruno denied the divinity of Christ, which is rarely mentioned, although, a Nova episode from 5 to 7 years ago did mention it, but only in passing.