The original poster of this thread is referring to just ONE species of ET so incorrect to use the phrase "alien agenda" as this phase gives one the impression that there is only one absolute alien agenda and that this is the agenda of all aliens.
In my experience, research, knowledge and intuition, there are vastly many more what you would term "positive E.T.'s" than there are "negative".
It just so happens that some of our planet's dopey governments couldn't discern between those ETs that had our best interests at heart with those groups that had their own interests at heart when they made their pacts with them in the 1940s. Yeah, thanks US Govt/military for that one!
Ultimately though in this 3rd Grand Experiment the LIGHT does indeed triumph.