Are extraterrestrials a hoax (read details)?

Extraterrestrials are extraterrestrials as long as they are not from earth. they can have dna and rna and still be an extraterrestrial. we do not know if dna or rna forms on other planets, however there is a decent chance it could because mere humans can recreate amino acids (the basic building blocks of dna and rna). i do agree that they most likely would be made of other substances though. and there is no basis to say only protein based life can form intelligence, considering that the only life we know of is protein based. however, i believe in et's because of the sheer number of galaxies in our VISIBLE universe. probability says that if it can happen here, surely it could happen on at least 1 other planet out of the trillions of planets in the universe. but i doubt they have been to earth because think about what happened to the native americans. they were less technologically developed, and they were nearly exterminated because of that.