The Angleton reaction, to me, undercuts Morley's claim of his involvement in the assassination. It doesn't disprove it; but it doesn't make much sense that he would go through all of that if he knew Oswald wasn't the assassin but his own people were.
This gets back to my earlier point about "different interpretations of factual information".
My interpretation is that someone with a guilty-conscious might want to direct scrutiny and suspicions towards a different target. Some CIA officers are experts at deception and that kind of deception would fit Angleton's skillset.
But I'm also aware that our own personal biases affect our interpretation of facts like that. All I'm trying to get across is that there are other ways to interpret his behavior. There's no wrong answer on this point.
It should also be noted that even today, many former CIA officials like James Woolsey for example, have publicly stated their suspicion that Castro or the Soviets were involved. The Nosenko incident didn't end speculation within the CIA.
Former CIA agent, Robert Baer has gone as far as speculating that Cuban spies posing as anti-Castro Cuban exiles conspired with Oswald. Which is possible I guess but may also be intended to take the heat off of the Cuban exiles that were working for the CIA (whom RFK initially suspected played a role in his brother's murder).
Lastly, concluding that there was a conspiracy doesn't exonerate Oswald. Not sure why you seem to imply that "conspiracy = Oswald's innocence". I've followed Morley's blog for a few years and never got the impression that he believes Oswald was innocent.
As to Trump and the collusion story: One interesting aspect to me was Trump's reluctance to condemn Putin or Russian intelligence for spreading the stories. The original claim was that Russian agents or ex-agents gave Steele that information. Trump was angry at the media but didn't condemn Putin or Russia. Very odd.
Trump seems to have some sort of admiration or affinity for authoritarian leaders. It's not just Putin but also the Crown Prince of Saudi Arabia and the President of Turkey that Trump had good relations with. In fact, there's more evidence of Trump benefiting financially from his relationships with Middle Eastern leaders than with Putin. So while there could be something there, it may ultimately be about Trump being a fanboy of authoritarian "strongmen".
It now appears that all of Steele's allegations were based on rumors that, in part, were disseminated by Democratic operatives. That's pretty stunning to think that the country was put through all of this and it was, perhaps - perhaps- some sort of sting by Democratic party people. The media - those outlets that pushed it - have some explaining to do.
I agree. Like I said, I initially bought into the collusion narrative but as we got more evidence and context, it seems far less probable now.