This ship sailed 50 years ago, I'm afraid. Businesses can no longer discriminate (including refusal to serve) on the basis of race, gender, religion, disability, veteran status, and a variety of other factors. Now, this is almost certainly a good thing - there's been a few negative consequences of the change (destruction of black businesses, for one) but on net it's not really close.
So really all people are asking for is "political affiliation" to be looked at like "religion". And honestly, there's a smaller and smaller set of differences between the two categories as the years go by.
No one said that. We can criticize companies for censorship with or without wanting government intervention.
Should government really keep pharma companies from selling you pills that are filled with snake oil?
Should a government really force you to allow black people to eat at the same tables in your restaurant as white people? It's your business after all and it's private. You should have a choice on which customers you get to serve.
The things you listed entail selling materially defective good, and discrimination on the basis of race and gender. These are not examples of compelled speech. Here are some more applicable questions:
* Can the government force Hacker News not to flag and hide certain posts?
* And the government make a bookseller to stock certain types of books?
* Could Trump pass a law or executive order to make Twitter revoke his ban?
* Can the government official compel a newspaper to print certain content?
The last one was actually addressed in a Supreme Court ruling [1].
Freedom of speech includes freedom from compelled speech. It's also against the law to tell a person or business to print or say something, or not ban certain content. Sure, if a business exclusively bans content based on the race of the poster they they could fall afoul of anti-discrimination laws. But note that it wasn't the content of the speech that matters here, it is the discriminatory nature on the basis of race.
These protections don't magically go away when a company grows to a certain size or number of users. Market share is relevant to things like anti-trust and anti-competitive behavior, but the people claiming that Facebook or Twitter have to run content because they're big are incorrect.
The exceptions to protection from compelled speech are very narrow, like showing your passport at the border and nutrition labels on food or health warnings on cigarettes. They almost always have a direct and tangible safety or administrative justification. Furthermore, political speech is the most protected form of speech in the US by far. I would be astounded if we ever pass legislation compelling platforms like Facebook or Twitter to host content against their will.
I agree that the principles of inclusion and freedom of speech should be upheld by Facebook and Twitter, but I strongly disagree that they should be enforced by the government. I could see wisdom in making ISPs, payment providers, and DNS providers act like utilities and extend services to all lawful customers, but not at the application layer.
1. https://en.wikipedia.org/wiki/Miami_Herald_Publishing_Co._v....
Do remember, it's a democracy. The government by the people, for the people and all that. Not the people VS the government.
Even if the heavy hand of regulation were applied to private corps, it seems like they'd still draw the line somewhere.
In fact there have been many laws requiring companies to carry messages against their will, including the Fairness Doctrine, the Equal-Time Rule, and Common Carrier laws, as well as the failed, but generally regarded as Constitutional, Net Neutrality proposals.