Principal resigns after Florida students shown Michelangelo statue

This is the most important paragraph in the article imo. Later it mentions Queen Victoria was also shocked in 1857 and ordered the statue's private parts to be covered with a leaf.

Many of these ridiculous Americans scandals are not too shocking if you consider some areas of the US are culturally stuck in the 19th century.

In the article's example, it doesn't seem many of your points would apply. The school board is elected at the local level which rules out a good bit of those.

There's also the possibility that the voters/parents don't care about the nudity, but rather empathy about the lack of notification. They probably want to be notified of other sensitive topics and see the utility in such a policy in general. That was the real issue here.

Coming back to structure though. The biggest thing leading to outsized impact of minority groups are primaries. Primaries have such a low voter turnout that a minority group can have an outsized impact. To exacerbate this even further for the president, that only has to happen in the first few states for other candidates to drop out due to the staggered primary dates. So you end up with about 20% of voters in the first 10 states or so deciding who the main two candidates will be for president. The two party structure also contributes to the polarization as candidates are more concerned about opposition to a single party rather than alliances with other parties.

Injecting people with shameful feelings about their most private (and most natural) parts of their lives is truly powerful. If you get the followers of your religion to see sexuality and nudity as something deeply shameful in the eyes of god, they will think about your religion before, during and after each slightly sexual encounter — you truly own them.

While in most catholic parts of Europe this kind of prudity became increasingly outdated during the last half of the century — to a degree where even my catholic Hinterland has no problem with topless women at the lake, my feeling is that the prude mindset runs much deeper in big parts of the US, Hinterland or not.

The overly prude censorship from the "freedom of speech"-nation was always somewhat surprising to Europeans. But only with the spread of (US-owned) social media platforms this became truly apparant. Shock! A female nipple! Censorship! Banned!

I'd argue that the rules of social media get internalized in society as well and that in a somewhat ironic sense this is making everyone more prude.