Why would the entire world be affected? It's the US applying specific protections against China, which has already isolated itself. Nothing changes for the rest of the world.

The world has the exactly the same concerns towards the USA based companies. What changes is that from now on it is acceptable to block apps and websites but blocking them was considered a free speech issue and Up until now blocking apps and websites was something that that only dictators would do, not anymore.

Blocking foreign companies is not a free speech issue. Also free speech isn't a law, and the 1st Amendment has nothing to do with some social network provided by a private foreign corporation that must still follow US regulations to operate here.

The rest of the world is not going to change just because we start to treat China the same way they treat everyone else. Perhaps you should read up on how India and other countries are also defending against China.

You understand that not everyone is US citizen, right? In fact, only about %5 of the world is, therefore %95 of the world is not bound by amendments in the US constitution and by foreign corporation they mean US corporations.

How do you think US corporations were able to grow to global scale without registering legal entities in the %95 of the world? Because due to the US pressure and advocacy for free speech not letting Facebook, Twitter, Instagram and others to operate was considered a matter of free speech in the pro western world. Russia and China did not played that game and had homegrown versions.

US is not going to win China and is about to lose the non-US wester countrieds by blocking TikTok. After the TikTok case no political activist will have credibility when the next dictator or would be dictator blocks Twitter. In places like UK/EU where local companies aspire to compete with the US ones you can expect much more hostile environment for the next US startup because no longer the issue would be a matter of freedom but national security.

You understand that not every company is a social network, right? There are thousands of multinational corporations that operate in several countries, and every country enforces various regulations against these foreign (as in the opposite of domestic) companies.

US companies are welcomed because they provide investment, jobs, resources and opportunities that weren't otherwise available or developed domestically. This has absolutely nothing to do with free speech (which again isn't a law and isn't even the same in other countries).

China specifically acts against free trade and is now being treated the same way (after decades of being unfairly tolerant to them). This is no different than tariffs and sanctions against other troublesome nations. Nobody is going to start blocking US companies because of this.

obviously we are talking about companies that do their business over the internet(not only social networks, pretty much anything that can scale fast). There’s nothing new for those who need physical local presence or sell goods that go through regular customs. If US App&website banning becomes a thing you can expect to be able to continue selling wine to France as before but loose access to the French Ad market without properly incorporating In France(making it illegal to Buy ads or run ads from companies that don’t meet a set of regulations that only a local company can meet ).