First thing, trying to use wikipedia to prove a point is silly as hell. Second, go ahead and prove that any of these conspiracies are true. Its a lot like religion. Believing in something without actual proof is also silly as hell.
What's your problem. He posted the proof right there for you, just because he used wikipedia as a source doesn't make it any less proof. Go and search for it yourself and check out plenty of other sources saying the exact same thing with the exact same proof.
Pull your head out of the bloody sand and wake up. The world ain't all sunshine and rainbows.