They want politics.SE to remain a "safe space" for establishment/leftist views
When you make a claim that goes against establishment views (as you do in this meta post), please include the evidence that convinces you the status quo (regarding the content of your post) is wrong.
For example, when you claim that CNN or the NYT (sources others deem reputable) are fake news, you should support that with convincing evidence (or post them on Skeptics SE to see if they might fact-check them). Note that a conspiracy theorist's website or their theories are not convincing sources.
This is censorship. It's quite despicable, frankly. Is it not possible to have a grown-up conversation about these issues?
Just like you have the right to free speech (in your country, not on specific websites), people on this website have the right not to take heed of your posts. When your posts don't meet community standards, users will vote them down and ultimately delete them. When this happens too often, the site automatically prevents you from posting because it expects (based on past behaviour) that the new posts won't meet the standards either.
In addition to that, this isn't really the place for conversations. This is a Q&A site for asking questions that can be answered based on facts. That's not possible if a question has a false premise or is aggressively phrased to push an agenda. If you really want to have conversations, I suggest having them on a different site that allows and is designed for having discussions.