@Not_a_ID
Much like how in the modern interpretation, Google can't violate your 1st Amendment Rights because they're not the government.
Yes and no. This is where OTHER laws come into play, regarding simple hosting versus editing of content. Thus, we have US Code Title 47, Section 230 - which on the face of it, seems to give Google, Facebook, Twitter, and others free reign to edit their own content.
However, there's one little term in that law that's causing them problems. Good faith. Which means that they have to treat both - or all sides- equally and fairly. Which they are not.
For background, especially regarding civil or criminal liability, it's effectively whether or not Google, Facebook, and the others are acting as publishers or merely as distributors. Under U.S. law, the publisher of slanderous material could be held liable, but if someone simply distributed the material and was not responsible for what they passed out, OR did not edit the material at all, then they were not liable.
Facebook, etc., are hosts - so they are not liable for the content of what is shown on their services. They're even covered under the Good Samaritan clause in the US Code if they edit things without materially changing what was first said - even Constitutionally protected things. All well and good. So long as they're acting in good faith for the general public - and thus not acting with bias.
Which, of course, has recently been shown that Google algorithm's and Facebook editors routinely do, which is act with bias. This is in violation of the above mentioned US Code - because now they are the publisher, not the distributor.
In other words, if they don't allow EVERYONE free speech, only SOME people, then they ARE violating your First Amendment Rights.