Would extraterrestrial alien civilizations be friendly or malevolent? Here is a post that argues they would be benign:
The second possibility is a little more intriguing. Imagine a benevolent or benign spacefaring alien species, akin to the Vulcans from Star Trek. If they’ve figured out how to successfully traverse the distances between the stars, then they have technology that’s at least hundreds of years beyond our own, and potentially thousands, tens of thousands or more. We have enough problems on our world figuring out how to manage our own planet, and we have the resources of an entire world, a solar system, and a massive, energy-giving Sun. For a species to come as far as an intelligent, spacefaring alien would have come, they must have figured out a solution to a whole slew of problems that humanity clearly still grapples with. Meeting a civilization such as this could only have positive outcomes for our own.
Go here to read the rest. I doubt it. We know of one intelligent species, our own, and we have produced myriads of cultures and civilizations. One can only imagine the infinite variety of intelligent species that God may have populated the vastness of space with. If that is the case, we can only hope that we will not be contacted, or that when contact occurs we are the more powerful or that we luck out and a more powerful species saying howdy is benign. In any case, rest assured that our well being would take second place to the well being of any contacting species, in the eyes, or whatever they use, of the species making contact with us. It is also quite possible that their motivations may be as opaque to us are as ours are as opaque to the squirrels who populate the trees around us. Assumptions about such civilizations prior to first contact are not only rash, but as absurd as they are dangerous.