It’s called microtargeting, all big tech companys are sorting people in groups, just by their use of the service. It starts with simple things, for example: cats or dogs? And this goes deeper to your religion or sexuality, politics etc. Created mostly for advertising it got used by political parties. Check the Cambridge analytical scandal. If you easily able to sort the people for your target you are able to manipulate your targeted people.
Newest scandal for microtargeting came from the EU-Commission with the chatcontrol.
OK let’s say there are Nazis, but this belongs to other countries, too. If it is allowed to invade your neighbor because there are Nazis in it, you can overrun east-europe including parts of east-germany, or Italy, their leader doesn’t have a problem to follow the example of Mussolini. Even in the US there is a cult for nazism, invade them, too?
Handle their nazism-bullshit belongs to the inner security of a country, no other country has the right to invade them just for cleaning up nazism. Because invading and killing people is what real nazis do in favor.
tl;dr: It’s a difference to hype a cult like neo-nazism, or invading/killing and doing real nazi shit.