No (or maybe yes). I'm talking about 20, 15, even 10 years ago where no one got upset over who was at cons, who was at someone's table, who was in what movie, etc, as long as they were decent people while they were about it.
No one whose voice reached your ears. You mistake that for no one at all. Your "no one" includes Samuel Delany. He wrote an essay, twenty years ago, about his experiences at science fiction cons, and who did and didn't share tables with him.
More than ten and more than twenty years ago, MLK took an interest in whether dark-skinned SFF fans might see an occasional face as dark as theirs on the screen. When he heard that Nichelle Nichols was considering ending her role as Lt. Uhura, and pursuing her dreams of a singing career, he persuaded her to stay with Star Trek. Nichols says:
"I was offered a role on Broadway. I was a singer on stage long before I was an actress, and Broadway was always a dream to me. I was ready to leave Star Trek and pursue what I'd always wanted to do... Dr. Martin Luther King, quite some time after I'd first met him, approached me and said something along the lines of "Nichelle, whether you like it or not, you have become an symbol. If you leave, they can replace you with a blonde haired white girl, and it will be like you were never there. What you've accomplished, for all of us, will only be real if you stay." That got me thinking about how it would look for fans of color around the country if they saw me leave. I saw that this was bigger than just me."
Shatner, Nimoy and the rest of the team were decent people, or at least Nichols hasn't said otherwise. If she had quit, Roddenberry would have recruited some equally decent person to succeed her on the cast. Your "as long as they were decent people while they were about it" was NOT enough for her and for MLK.
What progressives (that's me!) call "representation" mattered to a little girl named Whoopi Goldberg. In her words: "Well, when I was nine years old Star Trek came on. I looked at it and I went screaming through the house, 'Come here, mum, everybody, come quick, come quick, there's a black lady on television and she ain't no maid!' I knew right then and there I could be anything I wanted to be."
You think that moment of enthusiasm, isn't the flip side of "upset"? Not "upset" as in throwing a tantrum; "upset" as in resignation and resentment, same way people were "upset" when they couldn't vote, couldn't marry across racial lines, and couldn't drink at the same water fountain as white folks. Same slow burn of resignation and resentment that almost every major character they saw on TV and in movies - even nonwhite characters, such as Othello - was played by white actors. (Orson Welles played Othello in 1951, Laurence Olivier in 1965.) White audiences in the USA wouldn't even watch "Charlie Chan" until a white actor played the title role.
"or the ideologues come for you" - That happens both ways. Yes, reviewers have opinions when a movie rewrites Chushingura to include Keanu Reeves as a white samurai, and individuals such as myself express agreement on social media. (Call me a purist; there were already movies of Chushingura, and AFAIK the Reeves vehicle added nothing useful to the existing body of artistic expression.) Similarly, in 2004 Ursula Le Guin objected furiously when a screen version of Le Guin's "Wizard of Earthsea" rewrote Sparrowhawk as white (he's explicitly dark-skinned in her book.) I raised my voice along with hers... that is, I posted on social media and I skipped the TV show. I guess you could describe a wave of posts on social media as "the ideologues come for you." IMO that's a overly dramatic, threatening description. That is, in contrast to...
If you dare to cast someone who *isn't* a white man, *other* ideologues may come for you, and *those* ideologues sometimes use rougher tactics. Some fans responded to Finn, in "Force Awakens", with cries of "white genocide" and calls for a boycott. Okay, I disagree but those are legitimate, non-criminal expressions of opinion. Milo Yiannopoulos, however, didn't just express opinions on the casting of Leslie Jones in Ghostbusters. He faked Twitter posts to look as if they were from her account (saying horrible things). He encouraged his fan base to troll her, and they did. For example, sending her pictures of her face, but altered to imply sexual humiliation. About a month after Twitter permanently banned Yiannopoulos, someone (I'd bet my thumbs it was an "ideologue" who shared Milo's ideology) hacked her personal website, decorating it with images of her passport and driver’s license, naked photos, and a photo of a dead gorilla. How efficient: a death threat, and the ape slur, neatly combined in one image!
(shrug) I don't expect to change your mind. If you see Samuel Delany as "no one", as in "no one got upset"; if you object to people with MLK's ideology gaining "positions of power in media and other arenas"; if you point your wrath for them, rather than at the people who harassed Jones; then you and I are at different ends of the range of participants of EN World. I'm writing more for anyone in the middle. For anyone who shares my hope that what Delany wrote in 1997 about science fiction, will someday no longer be true about D&D.