I don't know the particular circumstances of those sanctions, but all of these opinions have been widely disseminated on Twitter. Exactly none of them have been suppressed, as a quick Twitter search would immediately reveal.

I understand that the feeling that conservative/reactionary ideas are suppressed has been an important myth in conservative circles for at least a century (to varying degrees), and that opinion itself is one of those conservative notions so prevalent on Twitter, but as a statement of fact, it is very easily disproved.