Why are the ancestors coming home in UFOs?

UFO sightings are highly controversial and have not been proven. There are many skeptics on both sides of the argument. The US government tends to censor and hide details about UFOs and aliens.

Hypothetically, aliens would likely visit Earth to study our amazing ecosystems, to conquer us for our resources. Hopefully we would have friendly relations with aliens, however, knowing human nature, we don't tend to be kind and welcoming-at least on the political side of things. There would certainly be massive global votes and discussions if they were to visit us.