Hm. Another angle to consider might be the US weird stance towards religion. Whereas in europe freedom of religion tends to be interpreted towards freedom FROM religion, in the US it very strongly leans towards freedom OF religion.
In fact, in the US there is this sentiment that religion is beyond criticism, sarcosanct if you will, and as a result you have some religious practices that are almost obnoxious, people going door to door, signs in front of churches telling people they are going to hell, sects taking advantage of people and so on. It helps create a group mentality, and persons in the out-groups tend to be treated badly (its one of the core mechanics of totalitarian politics, after all.)

So how would a culture like this manifest in magical culture?

 

Wizarding society always felt very rooted in very old traditions. US as oposed to the UK is a very "young" country, with a lot of recently mixed ethnicities, so it's gonna be interesting to so how they tackle that. Also being fairly close after WW1 I'm interested in seeing if there was any magical involvement in that war.

 

I think any coverage of a fictional 1920's American subculture that in some way doesn't make use of or mention race would be strange. I have the feeling that blood purity is of much less concern to American wizards than race is. It would have been pretty much impossible for European wizard colonists to stay out of the oppression of Native Americans and Africans. I mean, kind of hard for muggles to keep wizard slaves or beat NA tribe's magic with guns.

It seems likely then that Wizard colonists helped their muggle counterparts with and in some way benefited from slavery and Native American wars. If that's true, then racism would exist in the wizarding world. Segregation? Maybe banning minorities from having wands? If racism isn't addressed in some way in the movie, I'll be disappointed. However, JK's relationship between the Magical and muggle worlds never really makes sense, so maybe racism will 'magically' not exist in wizarding America.

 

Perhaps there was a situation with the statute, which prevented migrant wizards from interfering with the Muggles' settlement of the continent. We have seen that wizarding nation states, while often reflecting muggle culture regionally, are not exactly the same as Muggle nation states, and wizards as a whole seem to operate on a more international scale.

Perhaps wizards in America of any race still feel more connected to other wizards than to racially similar Muggles, and form what is perhaps, on the whole, a more egalitarian society, while being either prohibited from or uninterested in educating the Muggles or making them behave.

We also have to consider that wizards, unlike Muggles, are constantly interacting with other magical beings and beasts, so there would likely be a greater sense of unity among humans just as humans.

Rather than having it be that wizards of the various emigrating nations facilitated war, she may try to work some situation where wizards, while somewhat hamstrung by the Statute, actually did their best to act as peacekeepers, facilitating (in any number of ways) things like treaties, etc.

Hell, maybe a black wizard (blacks even in Muggle America were not always slaves without exception) helped a slave or two escape. Maybe Harriett Tubman was a witch.

Typed on my phone - apologies for any grammatical errors.

 

Not that I'm making light of Harriett Tubman or what she did to help escaping slaves, but the above totally made me conjure images of George Washington Carver being a wizard, toiling away with peanuts to make a potion and found all those uses of peanuts as an unintended result (even if in reality they were all untrue). Like Dumbledore and dragon blood, though those were most likely very intentional.

 

Disagree/agree with this meta on the American wizarding population?

I quite like the idea of wizarding populations being located in most wacky/haunted cities. There's gotta be one in Disneyworld too.

Addition: most all/isolated wizarding populations are WASP. Mixed pop more likely to have cultural roots in mysticism (ie. shamanism, voodoo). Not sure where asian/latino wizarding pop would fit in this.