People should be respectful to Hayden or any other actor who never did anything wrong to them. Otherwise you’re just a nutcase. The beef is with George, not Hayden.
That said, there is nothing wrong with mocking prequel lovers and belittling their bad taste. Kids these days don’t watch those movies. It’s teens and 20somethings that watched them when they were kids and lack the temperament to grow out of childish things that were never any good in the first place.
Making fun of the prequels is one thing, I do it all the time. But knocking people for their taste in films is definitely taking it too far.