Most Species have not been discovered on earth yet, none from other planets.

Humans explored most of the planet, but about 86% of species are still waiting to be found. A study estimated that bacteria could add almost another trillion species.

Define aliens has a wide range of meaning from Mexicans foreigner to creatures from another planet. Confusing cause Mexican have a much longer history of America than Europeans and creatures from other planets have not been discovered.

Aliens define unnaturalized, unfamiliar; strange:
an extraterrestrial, opposed; hostile exotic estranged, outlandish.
People alienated her friends and other members of the family, when they became fanatically religious"

About 12 million Americans claim the United States government is run by reptilians people. But they never said which members of the government are the reptilians. The Pope says Aliens are our Saviors and other believers think they are our destruction, like Satan. Looks like they got you coming and going. I'm not convinced of either.

The simple answer is the greedy keep people ignorance by a tool tactic of Religion, military and political fears. Fear is simply that of the unknowns.

Back in the 1930s, Henry Ford remarked that it was a good thing that most Americans didn’t know how banking really works, because if they did, “there’d be a revolution before tomorrow morning”. You can imagine Centro banks are at war with countries that don't accept belonging to their system.

I'm fearless and can no longer live in their lies and fears.
How about yourself?