Some of that is true and some of that may be true and some of that is
not true.
Yet none of it should be discussed on an astronomy site. Astronomers do
not want to be associated with supposed aliens that are visiting our
planet, because their colleaugues and other scientists and other people
would assume they had lost their marbles and would ridicule them and
they would almost certainly lose their job. Astronomers are interested
in stars and planets and galaxies, not in aliens. Nearly all
astronomers are physicists, not exo-biologists. The only alien
phenomenon astronomers might conceivably want to be associated with is
a continuous and therefore reproducible radio signal from far away.
None has ever been found and none will ever be found, because any smart
alien does not want to be bothered by primitives.
Anyone who wants to discuss aliens, has a million times more chance of
finding a receptive ear among people who are not astronomers - for
example goldfish collectors - than among astronomers.