We can all fall for this trap. I have a friend, firmly woke on the left and father of a trans child fall in this trap when he learned that the new Lord Of The Rings series was coming out and with black dwarfs. He was consumed by LOTR and fantasy even pre teenager and this just somehow cracked a ripple in his foundation.. short lived as it was, it was there for a second and to my mind, if it can happen to my friend, it can happen to anyone.
Not all of the backlash is based in hatred, racism, or sexism. Some of it is just straight of nostalgia and people in hollywood flat out stomping on things people love for the sake of change so they can add their own spin for no particular reason than catering to whatever the current culture trend is. I don't think many of us are immune to it in things we grew up loving no matter how 'woke' we may be. I for one do not care one bit about mixed race couples, but it has quickly become everything released has mixed couples. Now, I can say I don't care, but the reality is since in life isn't 100% mixed couples, its very obvious that is the current 'trend'. (Just an example again, by no means do I actually care).
I mean, has there ever been a batman that people were excited for after the casting announcement? And all of those people were white males. People are just judgey all around.