Yeah, but that's not really a 'Holocaust'. Sounds more like what Canada and Australia did to their Aboriginal children. It's a cultural genocide, certainly, but it's not the Holocaust we're talking about.
Interestingly, it also has another precedent in the US: it was common for certain ‘patriotic’ organizations to round up Irish immigrant children and ship them west for ‘Americanization’ in the early 19th century.
Whether Lindbergh would execute a local Holocaust is a difficult question, but I lean on ‘no.’ The OTL Holocaust stemmed from the intersection of Nazi racial thinking and military failure against the Soviets. The US has no analogous strains—Lindbergh was a racist shithead, but there’s no Red Army putting a time limit on his efforts.
If they want to extend the show past the source material, they could follow up on the conspiracy theory mentioned in the end of the book, that the Nazis has kidnapped the Lindbergh Baby and raised him in the Hitler Youth. Make that come true and you might milk a season out of him.