This isn't a new argument, and one i actually agree with to an extent. While i don't dislike the prequel films as much as many others do (and think the 3rd is actually quite good), the lightsaber sequences were a pretty mixed bag. I thought some were great, while others made me cringe pretty hard.
It's fine if you personally think all the prequels are great, but calling those that dislike them a lot 'mindless prequel haters' and 'brainwashed by the media' is stepping across the line. It's possible to disagree with someone without insulting them and establishing yourself as superior.
On a side note, this topic gives me an excuse to post this: https://youtu.be/J0mUVY9fLlw 
It's obviously exaggerated for comedic effect, but it still makes me giggle.
