If you're a public figure and mention the Rothschilds. You'll be molested by media and fired or even fined. This has happened numerous times to public figures such as that football player.

Rothschilds and associated families, and though it may seem extreme to see them as part of an international conspiracy...

It's not extreme when taking into account Maurice Pinay's work as well as Talmud verses and the racist supremacist ideologies of prominent rabbinical and Hasidic movements. Jews were some of the first billionaires for a reason. The rebbe exclaims that all Jews should be wealthy in Gold. Many of my posts show evidence of this supremacism and usurious of specific supremacist Jews; very much the same ones that were prominent in the Christian and trans-Atlantic slave trade. The House of Rothschild and his agents in the US all had their hands in the financial side of slavery.

...there is a lot of evidence about this, which leads to a number of other families, some of whom have been attacked and expelled from certain countries (not just Germany) for their actions.

Very true... the Sassoons are one example, and they were, like the Sacklers today, pumping opium into foreign countries or on people they hated or wanted to exploit. They were merely another wing of the Muscovy corporation. Hitler was the antithesis of internationalism and his claim of international Jewry and Jewish Bolshevism, although harsh, did have some truth to it. For if it didn't, he wouldn't have had the followers he did. Unfortunately, it is just the false conception that such a statement must imply that Jews are one big monolith under the wing of Rothschild or Zionism or Bolshevism.

It's not that simple. For example, propaganda posters for vaccines that date back 120 years have been helpful, to help eradicate polio, for example, and other problems.

There's revisionist theories about the polio vaccine and how effective it really was. I won't go into that now though.

Neo-Nazi propaganda today isn't about a national worker's party, but especially about white supremacy, and thus not helpful, by many standards.

Indeed, much of the neo-nazi crowd are Zionists and Suprematist Jews leading these theatrical nazi movements. The alt-right is even more Zionist. Research the National Socialist party in America which was fronted by a Zionist pedophile Jew named Cohen who would goose-step into Jewish neighborhoods of which the ACLU hilariously worked on the side of Cohen because it would be against his freedom of speech had he been prevented to do so. Interesting, no?