Here's my response. I'll add to it in the next post, as exactly how some Catholics try to justify the view that the Church was not concerned with Bruno's and Galileo's scientific views is worth unpacking...
Dear Dr Danielan
I just received your letter to The Guardian.
Thanks for taking the time to respond to my letter.
I can’t say I agree with you, though. The issue I addressed, remember, was whether Galileo and Bruno were hauled before the Inquisition for their scientific views, or merely their theological views. I rejected the claim that it was only their theological views that were of concern to the religious authorities.
I pointed out that, as even Koestler says, Galileo was indeed condemned for his scientific views, in particular, for repeating the claim that Copernicus’ system was not just a useful hypothesis but literally true (a claim he had already been warned by the Church not to repeat).
You agree, I see. But then you agree that his scientific views were indeed of concern to the Church, do you not? True, you add that Galileo had no proof. Perhaps. But that’s irrelevant to the point being discussed.
Second, you maintain Bruno’s scientific opinions were of no concern to the Church, and quote Koestler in your support.
Perhaps you are unaware, but Vatican documents now confirm the opposite. Go to: http://asv.vatican.va/en/doc/1597.htm, where you will find this:
In one of the last interrogations before the execution of the sentence (maybe in April 1599), the Dominican friar was questioned by the judges of the Holy Office on his cosmogony conception, supported above all in the “La cena delle Ceneri”(Ash-Wednesday Dinner) and in the “De l’infinito universo et mundi”. Even then, he defended his theories as scientifically founded and by no means against the Holy Scriptures (left side, from the first line: Circa motum terrae, f. 287, sic dicit: Prima generalmente dico ch’il mo
Note Bruno was questioned on his “cosmogony conception”. And he defended his theory as “scientifically founded”.
Koestler was no doubt unaware of these documents. I also ask, where is the evidence to support your claim that Bruno was not hauled before the Inquisition for, among other things, his scientific views?
So, I stand by my claim that Bruno and Galileo were hauled before the Inquisition for their scientific views (which is not say that their theological views were not of concern too).
All best wishes
PS. I guess you may agree with Ratzinger, who thinks “The process against Galileo was reasonable and just”. Is it your view that the Church did little wrong in the Galileo affair?