It isn't that they're discussing anything which would traditionally be considered risky or out of bounds - that's the whole point. It's that they're discussing anything to do with an organisation which has made it quite clear that if it disagrees with you, it will find some way to make your life miserable. Even if it doesn't disagree with you today, who knows what it will disagree with tomorrow? This is the absolute classic way of instilling fear in a population, the original chilling effect - when you don't know what will be forbidden tomorrow, better to say nothing today.
Your latter point on assassination attempts is also very odd. It conflates some broadly disconnected things (an actual attempt on a presidential candidate) with an apparent murder based on political views, two unrelated but very direct consequences which you could perhaps correlate through the types of people targeted. On the other hand you completely ignore the wider systemic violence inherent in stripping people of jobs, healthcare, social security, etc. Do you think those actions will have no consequences? That no deaths will result? Just because a chain of action might have more than one link, doesn't mean the consequences can be dismissed.
[0] https://en.wikipedia.org/wiki/Give_me_the_man_and_I_will_giv...