I'm sure you knew every single person's views back then.The point is that the only reason people are mad, is because other people are mad. Back then someone probably didn't agree with a comedians act on gay people, but they weren't offended by it. Now we have people who don't agree with someones act, go on twitter and rant about it and stir up all of this false outrage that they otherwise would not have been outraged about if they had not been given a platform to be outraged on.
Or maybe they are mad because it's worth being mad about? You are being unjustifiably presumptuous in your aims to dismiss the validity of people getting offended. You said it yourself, it was made to offend, the point of it is "This will cause upset, backlash and offense," how can you be surprised that people end up offended? It's not false outrage just because more than one person agree it's bad. If someone gets on Twitter praising a movie scene or joke an a bunch of people agree and hype it are they stirring up false appreciation? Gtfoh