Too much to address here and I don't have the time. But you are jumping around a lot and conflating culture war nonsense with legal enforcement. While also implying huge swaths of people are right wing nazis....
Harry potter has never EVER been banned in the USA and to say that with a straight face means we are in completely different universes and further engagement is pointless.
Many groups may have lobbied a retailer or a local school or library to voluntarily remove it. Even just to avoid drama/pr. I personally vehemently disagree with this type of censorship... But it is absolutely not what we see in the UK. The US equivalent would be federal terrorism charges for having harry potter. Absurd.