They chickened out.

I think the explanation is simpler, and much less sinister, than that. Their last few attempts at major releases have gone really poorly, and the AC franchise has lost traction with their more action-focused, huge-world style game like Odyssey, Valhalla, and Shadows. I believe the drop-off in players between Odyssey and Valhalla was around 50%, in both revenue and player count. Mirage seems to have had higher revenue than Shadows, despite being a smaller production (both in scope and budget). Ubisoft shares have dropped dramatically in the past few years, long before Shadows was released and anyone was upset about a character in the game. 
SW: Outlaws was a monumental failure, Avatar: Frontiers of Pandora flopped (they struggled to pass 2 million players, on a huge budget), XDefiant crashed and was shut down, amid the general noise concerning live-service overload, Skull and Bones is among the biggest failures in company history (not sure they even sold 1 million copies).

Ubisoft is a heavily mismanaged company in deep trouble, and has been for some time. Blaming their caution on American culture wars and adverse reactions to a character in an AC game is just deflection, and likely a strategy to avoid accountability for their own shortcomings over the last half-decade or so. 

I guess I should have said North American centric then lol. (I blame the naval battles, really my least liked aspect in the games lol)

The most recent AC game I played is Rogue - planning to play Unity soon and then onward. 

I havent played Origins or Odyssey but from what I heard, high chance of me liking it. 

I want them to make more games from other regions that they havent tried like South America (Brazil or one of the other countries) and South Asia (India). 

Damn, would have loved to see Abraham Lincoln having a wizard battle against Jefferson Davis atop a giant mech as they fought for control of the time machine.

On a more serious note, would have been an awesome setting.

No worries lol, I really enjoyed Black Flag, Freedom Cry and Rogue. It was good to be on the seas.

Origins and Odyssey are massive games, but it's worth taking your time to explore them properly.

Yeah I agree on the last point. They made 3 2D platformers a while back called Assassin's Creed Chronicles. Set in Russia, China and India, would be cool if they became full games. South America would be good too.

Ffs, a game that would actually be interesting and a setting where playing as a black character akin to Django Freeman would be not only awesome but really helpful in today's US. They always take the wrong lessens.

OR why not just have badass black protagonist fighting mythical creatures and giant bosses etc and just leave any kind of politics to real world.
Yea i know its foreign concept to people today, but games are meant to be fun and to let us escape all crap that politicians are bombarding us with, left and right.
That is just me, i dont play any game that try to bring real life topics to something that should be ridden of it

Games are meant to be what the creators want them to be, and gamers are supposed to vote with their wallets. Saying otherwise about what games are or are not supposed to be is nigh politics.

Assassin's Creed wouldn't be Assassin's Creed without the historical/real world aspect. If you create something that's similar to Assassin's Creed but has no connection to the real world, it's not really Assassin's Creed anymore. That's certainly fine, but at that point, it probably shouldn't be called Assassin's Creed.

Again, its called Video Game, you know "Game".

I have 0 interest in politics and even less for american politics that doesnt concern me at all. 

You are right, its up to developers and what they want to make, and it up to me if i will support them or not. And since Ubisoft will most likely be owned by Tencent at the end of fiscal year, i am glad that most gamers think the same way as me.

A game is something that is played, by some loose definition of 'play'. There are all sorts of games, some deeply rooted in the real world, politics, and some neither. I don't like all games either, but I don't think it's my business to say they're something games are not 'supposed' to be.