You are not open-minded. You are gullible. You believe what fulfills your fantasy; reality be damned. You have built such a complex narrative around your fantasy, and it has become so important to you, that you refuse to acknowledge it might be just that: fantasy.
The litmus test of intellectual honesty is this: if aliens show up tomorrow and show us pictures they built the pyramids or whatever, we would change our mind and recognize we were wrong; but if we wouldn't find anyone in a billion years, you'll keep harping that aliens did all the cool stuff, and hide around in your backyard at night.
Also, learn to spell.