Most may be rubbish but there ate a few seemingly far fetched conspiracies that have been proven by judicial investigations and academic research….for example
NATO really was operating stay behind armies in a number of European countries as part of its postwar operation gladio program. In Italy these networks fused with ultra right wing terror groups to assassinate leftists and commit murderous terrorist attacks on the public which were then blamed on leftists.
British troops massacred rebels in Malaya and Kenya.
American and British intelligence conspired with Islamic extremists airlifting fighters to fight Serbian troops in Bosnia.
Countelpro files revealed a massive and illegal spying program on domestic us citizens by the fbi including black propaganda operations. Revelations confirmed by the break in at an fbi office.
CIA supplying state of the art weapons and explosive to Seaga’s JLP goons in Jamaica. The gangs got so powerful they left politics for drug running and became infamous as the shower posse
CIA protected a Cuban terrorist who blew up an airliner and used him as an asset in its Latin American and Caribbean black ops
There are countless well documented acts as well as some well founded rumours of similarly appalling secrets. Such as MI6 using a children’s home in Belfast as a child brothel for entrapment and blackmail opportunities against Irish politicians.
People just obsess over the daft ones when many are back by historic research and judicial enquiries.
The Vatican bank being taken over by Organised crime and its funds used to bankroll criminal activities
P2 lodge members being part of a secret state in Italy is a case in point. Sounds crazy but there’s at least some circumstantial evidence…Licio Gelli’s briefcase for example.
And no I don’t think the cia or fbi killed Kennedy…common sense tells you that it would have been easier and safer simply to release information and rumours about Kennedy’s affairs. That would have ended his political life in 1963