It boils down to this:

1. The US is incredibly reactionary and one of its more insidious form of reaction is the one-drop rule. Like, fucking Nazis thought that shit was too extreme and so had the more “moderate” Nuremberg laws where you weren’t Jewish as long as you had less than 2 Jewish grandparents. The one-drop rule persists so that it’s somehow significant that someone has an Irish great-great-grandparent. The inability to not see things through some bullshit race science lens is why Americans break down their heritage by saying shit like “My ancestry test shows that I’m 22.56745% Northern English, 20.52312% Southern English, 32.75675% Parisian, 12.56745% Catalonian, 10.53657% Bavarian, and 1.04866% Luxembourger. Oh yeah, I also trace amounts of sub-Saharan African ancestry, so I’m allowed to say the n-word.”

2. White America is absolutely devoid of any form of culture that’s not crass consumerism or communal way of life that’s not completely reactionary like an evangelical church that believes vaccines are the mark of the beast and the sign of the end times. This means white people, especially Euro-Americans who have been heavily assimilated to WASPhood and don’t want to become a Mormon or something, latch on to anything that lets them escape being a second-rate Anglo. It’s also part of the reason why Black people constantly have their artforms stolen and watered down by white people or why white people who are 0.000000001% Indigenous pull a Elizabeth Warren to the point where actual Indigenous people call these pathetic white losers pretendians.