I don't want to use HN to discuss politics, but notice that the 'Russian collusion conspiracy' is not a conspiracy theory. Donald Trump Jr himself published the emails setting up a meeting with a Russian lawyer which - he admitted - was supposed to yield information that'd help his father in the election. That makes it the very definition of a real conspiracy, right?

Isn’t that the epitome of starting a conspiracy based on flimsy accusation? And the conspiracy kept alive for 2 years, by whom?

Hm... not sure what you are trying to say. What flimsy accusation? Donald Trump Jr released the emails himself on Twitter? What in that is a 'flimsy accusation'?