Earlier quoted context omitted.
the life of a politically inconvenient story: 1. it's conspiracy theory 2. it was obvious to everyone 3. forgotten
I don't understand why this is a story to begin with. Twitter is a private company that does what it wants. It can boot or block whoever or whatever story they want to for whatever reason. Obviously if the people running the site lean towards one political direction, that's going to affect their moderation policies. Why don't we analyze Fox News's decision to run or not run certain stories. People's first mistake is…
There is clear distinction between content producers (like TV or newspapers) and platforms (like social networks, Youtube, and others). Content producers produce content with some bias, their consumers have (hopefully) similar bias and everyone is happy. Bias is here, it is editorial policy and nobody is understand it. It has some disadvantages in contrast to unbiased producers, but that is probably unreachable ideal.
With platforms, you have matching content producers and consumers (or just parties trying to communicate) and then you have third party (platform) who 'moderates' the content regardless of whether communicating parties are interested or not. Because it is not supposed to be editorial, it tries to dress it as rule enforcement. But biased rule enforcement is just much less acceptable than biased editorial policy.