You did not mock the film. You mocked his liking.
Which is because of the quality of the film and not his tastes in general. Regardless of how he would have responded I would have called the film terrible and scoffed at the thought that AOTC could possibly be on par with Rogue One.
Let me break it down for you…
A1: “I would have called the film terrible” - That would be okay since it is only concerning the film. But you did not do that.
A2: “scoffed at the thought that AOTC could possibly be on par with Rogue One” - That is what you actually did, i.e. mocked his preference.
Also if this is a personal insult then you have insulted me dozens of times for liking TFA so practice what you preach.
I did not mock your liking of TFA (did not do A2). I only stated the truth that TFA is terrible (A1 equivalent).