Unfortunately, it will fall on deaf ears. The people you are trying to reach are, by definition, not rational. Like you said, seeing everything as a conspiracy is a disorder. Your rational arguments ain't gonna sink in like some much-needed cognitive therapy. They'll probably think you are on the CIA payroll or just a blind fool that needs to watch more youtube. Best to ignore or downvote such posts, and move on.
Of course, I defend their right to post any such theory on here (if Michael tolerates it), as I defend my right to ignore them.
“With laws shall our land be built up, but with lawlessness laid waste.”