It's really simple: President Trump is accusing Joe Scarborough of murder because Trump doesn't like that Scarborough criticizes him on his television show. If Scarborough were to stop criticizing him, Trump would stop accusing him of murder.

If Scarborough said nice things about him on TV, Trump wouldn't care if he was a murderer. We know this because Trump very publicly does not give a shit about, say, MbS ordering Jamal Khashoggi's dismemberment, or Xi's concentration camps, or Kim having his brother killed.

Also recall after Putin said that Trump was brilliant, Trump told Scarborough that he didn't care that Putin had journalists murdered https://www.washingtonpost.com/news/the-fix/wp/2015/12/18/donald-trump-glad-to-be-endorsed-by-russias-top-journalist-murderer/

And of course there's this: https://twitter.com/existentialfish/status/1265254653190692865

Now he's unleashed an army of conspiracy theorists on this poor family. They're going to be put through the ringer because Trump can't handle seeing criticism when he turns on his television. https://int.nyt.com/data/documenthelper/6968-jack-dorsey-letter/ffaa205b1364518c15b3/optimized/full.pdf#page=1

One of the few bright spots the last few years was Trump somehow never publicly talking about the Seth Rich case. I have no idea how that happened, given that the conspiracy theory made it to Hannity. But he's supercharging the same thing right now.

Ted Cruz says only nice things about Trump now and mirabile dictu the president is no longer interested in whether Cruz's dad was involved in President Kennedy's assassination.

Don King loves Donald Trump, Donald Trump does not care that King killed people.

Yes, it's very bad that the president of the United States accused a former Republican congressman of murder because that former Republican congressman criticizes him and it is also very bad that his party does not care at all.

The question that matters isn’t “does Trump really believe Scarborough killed his staffer” — whether he’s lying or deluded is irrelevant. The question that matters is “what would it take for him to stop?” That’s what gets at just how messed up this is.

It is revealing that the family is appealing to Twitter to delete Trump's tweets rather than to Trump to stop doing them. There's just zero expectation that the president not behave like a monster.

Of course, even if Trump were to stop now, it's too late. He's already unleashed a horse of conspiracy theorist. Nightmare time.