This is a false equivalence. "What constitutes appropriate humor" versus "Government silences dissent." Just because the Diabetes conference cited their code of conduct doesn't mean that's actually what this is about.

This is what people seem to get mixed up about the First Amendment to the US Constitution. These scientists were removed from the conference because they were highlighting the scientific role to push back against government censorship. Not because it wasn't germane to the conference, but in furtherance of the censorship itself. The US Government participated here indirectly via its chilling on scientific discourse.

Comments in this thread suggesting that "this is just some private actors" are mistaken. This is absolutely the consequence of the Trump HHS policymakers decisions.