The concept of evil is quite simple and I don't know why some people have such difficulty with it.
An experienced and highly esteemed psychiatrist has written a book about demonic activity, and it's a pity that you can't bring yourself to read it.
Heaven is some higher state in outer space, perhaps a higher dimension that is unknown to us.
The Bible mentions a War in Heaven (i.e. an intergalactic war in outer space).
We all have different concepts of God, and no one knows exactly who He is, but God is by definition an extraterrestrial, or alien, because He's not of our Earthly world.
Haim Eshed mentioned the Galactic Federation, and God could be the Supreme Leader of the Galactic Federation that governs the realm of heaven.
Lucifer could have been His Second in Command and BECAME evil when he opposed God and challenged Him for the role of leadership.
The angels who sided with Lucifer also BECAME evil when they opposed God.
Life on Earth was created by a higher entity, i.e. God, and it wasn't abiogenized as some believe was the case.
The Bible says that we were created in God's image, and leadership challenges are very common in our history.
Satan and his demons are working to subvert us and turn us against God.
What we've been told so far about the NHIs is consistent with the Bible's War in Heaven and the falling down/exiling to Earth of Lucifer's demons ... just different terminology.
There are many known unknowns about life on Earth, and we all have different ideas, and obviously you and I will never agree. So be it.
