I don’t think he apologised for using the quote in the first place, but he expressed regret for the fact that it had been misinterpreted as being his own belief and expressly said that he didn’t agree with the quote. He couldn’t agree with the quote, of course, because that would be completely opposite to the opinion of the Church as expressed in Nostra Aetate. He’s made that clear now - and one possible fortunate side-effect is that a lot more people will now have heard of Nostra Aetate and our official view of Islam.
I’ve not seen anyone argue that. If the absolute truth offends, than you can’t do much about that. If our Pope had said that ‘spreading religion by violence is unacceptable’ - without the unnecessarily inflammatory quote - then that may still have offended some Muslims, but it would have been the truth, and we can’t have a problem with stating the truth. My only problem is with the use of an insulting quote when it wasn’t necessary to make the point. You shouldn’t cause unnecessary offense.
Mike