You can be a retard and say "hur durr there should only be white characters in the Thor MCU because thats what reality was", ignoring the fact that you know, the Norse didn't actually meet any of their gods, they didn't really live on a different planet and were a race of super beings who all spoke modern English, yadda yadda.
Does this logic work for black panther? There is no real Wakanda, it doesn't exist. Why can't Wakanda have white people? Why isn't Wakanda a multicultural society? Oh, I know, I know...because Wakanda is actually about race, right? But the warrior race a group of white people developed in the Germanic northland was multicultural. Okay.
Beyond that you are ignoring the fact that the Norse did trade and encounter Africans regularly, in fact there is a single word in ancient Norse for a dark color, "blar", which translates into either blue-black, black or blue. Guess what color the frost giants are described in all the Norse texts? Its also been genetically proven that ancient Vikings had a shit load of mongol and Sami DNA in them, and a few of their Mongol hybrid leaders had very dark skin and asiatic features including the Varangian Guard who were elite Viking troops serving the Byzantium Empire which had connections all over the world.
So because they named their devils as dark/black it somehow makes the gods/beings which are the object of their praise also black? That doesn't really hold true for any other religion, which often transpose foreign or "othering" colors onto negative aspects. Also Sami, the Western plains people were white. Eastern plains people, Mongolians, did have more east asian features, but they are also light skin (At their darkest they are "brown", but certainly not "dark"). But I digress. I fail to see how your evidence that the Vikings were employed in Byzatine
1200 years AFTER the Germanic religions begin to develop their specific myths has any bearing on myths that existed for more than a millennia before those migrations.
This is pretty weak shit to cover up something SJWs would be absolutely apoplectic over if it happened in reverse. Oh wait, we actually have examples of it happening in reverse, don't we? Hmm, how did the criticism go for Gods of Egypt when another cultures mystical beings were represented as white people?
'Gods of Egypt' director apologizes for 'whitewashed' cast
Oh...
Hell, I like Valkyrie. And it annoys the fuck out of me I have to point this shit out because I think adopting and changing other cultures to tell stories to your own culture is one of the best ways to expand story telling. If I saw Africans retelling various Western stories with black people, and black motiffs--I'd be flattered. Because it shows the story is good enough to connect on a human level. Skin color shouldn't matter, at all. But this is the world we live in, where people apologize for this shit all the time now. Its absolutely hypocritical to turn around and say people being annoyed at this shit only working in one direction is wrong.
That's the irony here. Before the SJW title wave, I'm sure none of us would give a shit about any of these characters. Stringer Bell as Heimdall? Fuck yes son. But NOW that the SJWs have essentially divided people into teams, to be the only one not advocating for your side is a form of nihilism that will perpetuate more and more being taken with nothing being given. And you shouldn't expect anyone to simply allow that. Either everyone is playing by the same rules, or no one should. And nothing will get rid of these rules faster than watching how quickly everyone loses if westerners decide to stop fucking around and start holding others to the same standards. Because there is a reason our culture makes fucking BILLIONS around the world, there is a reason everyone wants to "diversify" our culture while protecting their own, because our culture is fucking amazing. We should be proud of it.