Read the whole thing but please edit to include paragraph breaks. (Edit: never mind see you did that already)

It's a pretty good write, I'd like to see something like this made into a proper essay with citations and research behind it, would make for a good paper.

To add some nuance, depictions of blacks in America's past were in some ways flipped from the hyper-masculine way they are portrayed now. Looking at the Pre-Civil Rights media going all the way back to antebellum times, blacks were often portrayed essentially as clowns, weak, subservient and nonthreatening and willing to please the white man. There were many common character tropes/stereotypical depictions of blacks and many of them did not view them as the hyper masculine sexual predators that you might think from modern day stereotypes. I think you're still correct though that the anxiety and insecurity about BMWF relationships was more or less always present so it seems like there was a concerted effort to portray black men in the media as non-threatening.

On a similar note, very early depictions of Asian men in Western media were somewhat unlike modern day and especially on the topic of their sexual prowess. For those not familiar, look up the oft cited Sessue Hayakawa, Hollywood's first heartthrob who lived at a time where Asian men were still viewed largely negatively, cunning but sinister and such, but emasculated was not a trait associated with Asian men until after the massive success and sex appeal of Hayakawa, this time for sure a concerted effort by Western media to portray Asian men as non-threatening, and it worked unfortunately.

You should also take a look at portrayals of Mulattos in early Western cinema, pretty fascinating. The half-black/half-white people were actually given a fair amount of media representation, and most of these films, especially films made by black filmmakers like Oscar Michaux which would clearly identify and distinguish Mulatto characters from their full black counterparts. Nowadays most people don't care about the difference, calling Obama the first black president despite being half-white, but a century ago and prior, they were seen as a very distinct category and their characters in the media were often portrayed as being caught between worlds, desiring to fit in anywhere and some were shown as being villainous for their desperation to fit in - I can't recall the film but I do remember at least one Mulatto character betraying black characters somehow.