History channel is full of shit shows. And history itself, at least when it's not in big ol' boring dusty tomes of knowledge, is pretty much fucking bullshit as well.
When history gets mixed in with pop culture, or with politics, it instantly turns from semi-credible science to a bunch of badly manipulated propaganda. Written by the victor, and so on.
People do a lot of stupid things to get their 15 minutes of fame. Some might even believe their own bullshit. There's little point in digging through it.
If there are intelligent aliens capable of passing through hundreds of light years' worth of uninhabitable space and other similar technological miracles, you'd think they'd be smart enough to provide credible proof of their existence if they really wanted to, you know, meet us. Like, land somewhere and make their existence absolutely clear to everyone. It's not like they'd have anything to fear, a civilization capable of traversing light years of space can't be threatened by an earth-bound (har?) group of arguing nations. It doesn't require such amazing intelligence to understand how governments work and that smart people are bound to be cynical without being presented absolute proof.
So that means they're either non-existent, complete dicks, or that's about it, really.
In most cases, as it seems to be with a lot of delusions, it's just some poor schmucks trying to make something out of their pointless existence. It could be Jesus, it could be aliens, it could be ghosts, they're just happy to delude themselves to avoid looking into the meaningless void that is their life.
Coldie said:
Nobody doubts that UFOs exist, no evidence is necessary there. UFOs are everywhere, seen by millions every day, although they usually don't stay unidentified for long. Weather, planes, birds, but no Superman.
As for the so-called "aliens" that are supposedly visiting (or not visiting) Earth (or not Earth), Occam's Razor applies here more than anywhere else. Do not create unnecessary entities. If the aliens are real, good for them. If they are not real, good for us, I guess. Either way, all the cards are in their hypothetical hands and unless they choose to actually do something, their alleged presence (or lack thereof) here (or elsewhere) is absolutely irrelevant.
The simplest explanation is most likely the correct one. Until explicitly (and globally) proven otherwise, there are no "aliens" on Earth, no UFOs are a product of extraterrestrial intelligence, there is no Asari soulmate waiting for you just two Relay jumps away, the Borg are not going to assimilate you (at least in the next couple hours), and that thing in the sky is, in fact, a moon.
Also that. Always pisses me off how the term "UFO" got turned into a complete joke, thanks to popculture and what not. It's UNIDENTIFIED FLYING OBJECT. If it's a flying fucking saucer, it's already identified, no?