Ha! Ha! Ha! Brilliant answer, Amos! I think you may be on the verge of enlightenment... :-)
Forum Lurker - The best evidence in support of UFO aliens is actual cases of people seeing them, photographing them, etc. Once that has happened one sets about wondering about all the various other questions you raised, rather than just automatically assuming "it ain't possible". But...until a significant majority of people are agreed that they do exist...or until the government officially says they do...such personal testimonials will be discounted by most people, and photographic evidence will be discounted also (as a fake or a misinterpretation), and physical evidence will be discounted or locked away in a lab somewhere and forgotten. That's the way it goes.
Conventional thinking has a way of perpetuating itself by sheer repetition and inertia.
Ditto for crop circles.
Political parties are "no more and no less evil than the philosophy that spawns them." Agreed! But the word I would use for that philosophy is "primitive" rather than "evil", although it has produced certain rather evil effects.
God - If God is in fact infinite, thus beginning nowhere, being everywhere, and ending nowhere...then ALL empirical evidence can be taken as evidence of the existence of God. It just depends on what concept you have of God, that's all, and how you interpret the evidence. If, of course, you believe in a God that is somehow separate from "us", then you've got a real problem and no, it doesn't really make sense under the existing circumstances.
Let me draw an analogy. Suppose a jellyfish, made of millions of cells, and very much alive was the whole cosmos, the whole of existence. Suppose that each one of its living cells was a separate thinking being and they started talking among themselves about a "supreme being", their idea of God. That supreme being would be the whole jellyfish. Now if the little cells started looking around for this God, they wouldn't find him, would they? They would find each other. Hmmmm. What would really be tragic would be if some of those cells disagreed with others about what God was actually like, and started fighting wars over it. That would be kind of like cancer breaking out in the jellyfish. That's rather like what people do on this planet a good deal of the time.
Fortunately, the jellyfish has a strong enough immune system that it can handle this sort of thing, but the little cells don't always do so well on a local basis.