In my view, Spider-Man: Homecoming was the movie in which the MCU went SJW. Previous movies had the odd SJW element here or there (e.g. Heimdall made black for Thor), but they weren't noticeable if you weren't looking for them.
And then suddenly, with Homecoming, we have a deluge of blatant SJW material:
-Romantic interest is a black girl (whereas never in the history of Spider-Man did he go after a black woman, to my knowledge)
-His best buddy is Filipino
-The school bully Flash goes from being a big blond guy to a wimpy Pakistani kid
-Mary Jane becomes latino
-In the Washington Monument scene the latino MJ tells Peter that she's not going in because the thing was built by slaves, and the disbelieving Peter turns to the black security guard who confirms that yes, the monument was indeed constructed by slave labor. I wish I was making this stuff up, but I am not
-And in general, there are almost more non-white characters and extras in the movie than whites. It looks ridiculous at times
Still haven't seen Black Panther and anything that came after, but I will be soon. Homecoming was a good movie, but the SJW stuff pissed me off, so I expect to be getting more and more pissed off with every movie, from what I hear. And then we have the Homecoming sequel in July, which will probably be worse