I know I’m not the only one that has heard this. I get comic book and Sci-fi/fantasy writers probably lean left for the most part but I seem to remember liberals of the past being big on free speech and against censorship. Also I’ve heard SJWs complain about the original Star Trek because they had moved beyond race and you know everything today has to talk about race.
Stan Lee and Kirby are white males so they wouldn’t last today and on and on.
So what is a good response to this?
You aren't going to get anywhere with your interlocutor. Their feelings don't care about your logic. You can only make rhetorical appeals to observers. Step over it by pointing out how progressives arbitrarily change their rules. If x was always progressive, then it should be acceptable now. For the lols, get the SJW to take the position that the opinions of the past are irrelevant and bad, then point out that makes them a temporal chauvinist.