Why is this anything other than direct foreign interference in the democratic process?
Easy amazon interfered when it banned a app simple because of the poltical leanings of the people on its platform. Yet it would never ban youtube or twitter even when violent foreign extremist those to communicate with the world. Do you mean that part.
2. The difference between Parler, Twitter, and Youtube is that the latter two moderate their content.
3. Parler was banned because it wouldn't moderate violent content.
Your interpretation of events is incorrect. Even Parler, in their legal filings, are not claiming that they were silenced because they were a platform for conservative speech.