The ramifications if there really are non-human visitors to Earth
And have been for many decades is a question that always gets deftly diverted by the discussion of "Is it real or not?" No one ever stops to think of all the ramifications if it turns out to be true.
So let's suppose that it is true and think it through.
What we know: They have a propulsion system unlike anything we understand.
They are almost certainly based under our oceans.
It is almost certain that they attacked the island of Colares in 1977 and drained the victims of their blood. We can discern this because the tic tac video matches the description and capabilities of the ufos seen during the alien attack on Colares and also because we have solid photographic evidence of the hundreds injured and death certificates for those slain.
They are not our friends.
People in our government have been covering this all up.
Things we have to consider: That those responsible for the cover up are aware of the aliens intentions and are in collusion with them in exchange for unknown incentives, possibly their own survival. We have to consider that those keeping this info secret are traitors to the human race and in league with an enemy invader.
If they are in league with an alien presence, then how do we know that when Enron realized global warming was real, they did nothing because their alien overlords wanted global warming. Perhaps they want to wipe out all life on Earth but while they possess advanced technology, they don't want to use it for a variety of reasons. Perhaps they play by the Dark Forest philosophy and want to wipe out competing species without the possibility of alerting third parties to their existence.
The idea that the US govt. would keep this secret for national security concerns is easily dismissable. An advanced alien civilization is visiting Earth and the Commander in Chief is not allowed to know? That's a far greater threat to national security.
If it turns out that this latest disclosure is true, it doesn't just mean that members of the government committed crimes by hiding the truth, it means they may be colluding with the enemy.
Another ramification: in combat, the winner is usually the first one to detect the enemy. We've not only been detected for decades, perhaps centuries, but someone is intent on keeping it that way. Only the enemy would want to keep their presence secret.
In the end, however, it matters not what planet they were born on, the 1% may have got that way due to alien intervention or due to greed and capitalism, but at the end of the day they're destroying the Earth.
So if all this talk about non-humans visiting Earth is true, it begs the question (to quote Jim Brown talking to Richard Pryor) "What you gone do?"
And why should the answer be any different if it isn't true?