Curious, how do you know your friend is wrong? Was your friend factually wrong (a Holocaust denier) or did you just not like their writing?
With that said, I've critiqued writing I've not liked, but I rarely say, "I didn't like this", but rather I point out everything I think needs improvement, with at least one specific example to back up my point. As giving vapid criticism is easy, and producing works is typically much harder, I attemtp to put some effort into my feedback.
And always be aware that there's a good chance that what you might view as an improvement may not be. I'm no more offended that one doesn't incorporate a given piece of my feedback than I'd expect them to be in getting the feedback.
With that said, I've critiqued writing I've not liked, but I rarely say, "I didn't like this", but rather I point out everything I think needs improvement, with at least one specific example to back up my point. As giving vapid criticism is easy, and producing works is typically much harder, I attemtp to put some effort into my feedback.
And always be aware that there's a good chance that what you might view as an improvement may not be. I'm no more offended that one doesn't incorporate a given piece of my feedback than I'd expect them to be in getting the feedback.