Since the government is leaning on them to do it, this is clearly a Constitutional right to free speech issue.
I used to be part of the "its a private platform" group, but I asked myself the question, what would actual government censorship look like. And I couldn't think of an answer that would make what we have today not censorship.
https://www.npr.org/2021/07/07/1013760153/donald-trump-says-...
we have instead a limited notion of free political when and where it does not immediately cause death of others as that would be denying them life and pursuit of happiness under the Declaration of Independence.
Big difference