Cospiracy Theories based on Trends?

I have been having the feeling for a while now that conspiracy theorists have conspiracy-trends. Depending on the current subject they have, youtube is full of videos they post, fiends of mine talk about it and everything, but then rapidly the trend changes and that conspiracy, they believed in before changes into something different, and even more "brainf#@!d". I am just getting the feeling that the online community needs something they can build up weird conspiracy theories around, and bitchtalk about.(excuse my language)
Maybe I am wrong though, and there IS truth to what the claim...
you decide.

Obama a second Hitler? lol

This man claims to have worked for the US- Government on what people would call a big Conspiracy. He says that they are planning on a Mass-murdering of the american people, so they can begin a New World Order. According to him, they have been planning to begin a WWIII so they can commit genocide. Seriously, don't over-do it! This man's claims are very far-fetched. I know we have all heard of those FEMA- koncentration camps supposedl being built all across the United States, but he just takes it too far with his bullshit.(Excuse my Language but he makes me mad) It is very well possible that the leaders of all countries of this world do belong to a "secret" group (bilderberg), as stated in "The Obama Deception", but that just does it for me. Basically that old guy is trying to tell me that Obama is the second Hitler? please...