You mean the kind of conspiracy theorists that said the CIA was arming a salafist contingient in Syria that eventually became known, over night, as ISIS?
http://www.zerohedge.com/news/2017-12-15/weapons-went-cia-isis-less-two-months-new-study-reveals
Weapons Went From The CIA To ISIS In Less Than Two Months
Mainstream media in 2013: "Conspiracy Theorists!"
Mainstream media in 2017: "ISIS Got a Powerful Missile the CIA Bought!"
When news of the 2012 Defense Intelligence Agency report broke, which described what it called a "Salafist principality" or "an Islamic State" as a strategic asset or buffer in Syria that could be used by the Western coalition "in order to isolate the Syrian regime", American media outlets dismissed what was labelled a "conspiracy theory" at the time in spite of the hard evidence of a US military intelligence report being made available.