Could aliens ever successfully invade planet Earth?

Alright, so where would these physical demons appear from? From hell, or from outer space? Seriously... all you need to to is arrive at a logical conclusion. Is space hell because it’s the unknown? This is archetypal conservatism. 

You're really going to re-establish my opinion, because you don''t like how it was worded, then my justification, and, finally, my extrapolated conclusion, and I've had naught to do with any part of that other than expressing an opinion?  Why don't you just take my identity while you're at it. You've usurped everything else. Back off. My shoes are mine, thanks.

Well if we find aliens, we won’t thrive if our thinking is informed by fundamental Christianity and the consequential fear of the unknown. 

It's wrong to assume that aliens would have a physical form or that they would be conceptualizable by the human mind.

If we assume that the aliens are biological life forms, then yes they are indeed physical and bound by the laws of physics.

It's incredibly difficult to know given how little we know about alien species. You think that they'd fit in with our classifications but they will not necessarily do so. They may not be biological in the traditional sense, either.

Have you ever seen the aliens from 2001: A Space Odyssey? 

I have not seen that movie. Yet I know that by "alien" I am referring to the scientifical idea of intelligent (biological) life on other planets. 

You keep using human classifications to assume things about life forms we could not possibly understand yet. 

What human classification are you talking about? We live in a physical universe, that's a fact, not a social construct. Biology is the only viable way for life to exist in our physical universe. Claiming otherwise is to deny established science and would require evidence or a logical demonstration.

Everything in the universe is physical? 

I don't deny established science on earth, but I question whether the newest rendition of science is applicable to the whole of the universe and every phenomenon therein, especially since our conceptions of science, physics, logic, etc. are still evolving. 

Physical: of or relating to natural science

Yes everything in our universe is physical. At least, if demons existed they would neither be physical nor aliens in the scientific sense.

I meant the second definition in that dictionary. 

I don't care what aliens are in the scientific sense. I do not rule out the possibility that there are conscious (or conscious in some sense) beings that exist in a way that is not conceptualizable to human minds, human science, and/or human logic. 

Who says Christianity results in a fear of the unknown? Your pocket mouse? Faith is the medium by which all fear is defearted. It must be applied, and it is a greater forc e than mere belief. If you don't get that, you don'r understand what failth is, how it operatres, or what it can accomplish. Without it, yes, fear is a mighty force. A force that is in us to repel.

Yes, they could. They are indestructible living metal aliens with faster than light invisible ships with an infinite amount of destructive laser technology.

Seems we are confused about what constitutes a spirit being. Spirit matter is still matter. It just does not have properties we currently understand as being material, or physical, if you want to use that gross concept [gross in the meaning that it is not specified sufficiently]. Spirit matter is refined, and, typically, not seen - as if "seeing" were the only means of its sensation. Consider it something like water, which actually exists in at least three forms: liquid, solid, and gas. There is, however, a fourth. Liquid water requires a. minimum of six molecules of H2O to exhibit as liquid. Five or less, it is not liquid, but something else. It's not solid, and its not really gas, even though the molecule is a combination of two gasses. Spirit matter is something like that. A plasma? Perhaps that is the best scientific description.

Or amplified due to misinformed superstition. 

No need to worry. We can simply use mirrors to reflect their attacks. Infinitely destructible lasers sure destroy aliens that are merely indestructible x1. 

Hmmm... humans have been known to dodge bullets. Clips of this phenomenon have been recorded and used in popular movies for quite some time. Also, our lovely Donal D. Trump would be more than happy to create a wall to keep these dangerous immigrants out. There is no need to worry, we will get the aliens to pay.

In this popular film, the actor dodged bullets to create this powerful scene. Verrrrrrrrrrrrrrrrrrrrrrrrry impressive I might add.

Films ain't reality brother. In reality, bullets kill faster than a person can move. And alien bullets are gonna be faster with the tracer rockets they install on the backs to propel them faster.

Brother, infinitely destructible lasers don't exist either. 

Yeah they do, the aliens have them. Remember, they have a technological head start, so I can give them anything I can imagine

Infinities don't exist within the bounds of realism, and thus aliens cannot scientifically speaking possess infinitely destructible lasers.

Infinities do exist. And the aliens have utilized them

Faith is a matter that can lead only to truth, if faith is what is being applied. That is its distinction from belief, which only may, but may not lead to truth. Most people align truth and belief together. They may be related, but are not the same thing in that respect. It is impossible to have faith in a lie, or even an unknown that is not true.  It will not ultimately sustain as true, and, by the sure knowledge that it can be revealed by the Holy Spirit, can be perceived without waiting fro God to tell us. In fact, the assuran ce by the Holy Spirit is God telling us. "Waiting for God" is the right characterization. He will reveal as we show our determination to know.

Yet you’ve brought up demons on a topic about aliens. It shows mental instability in the face of nuance.

Either of you want a debate on the topic? My position is that with a sufficiently advanced infrastructure a hypothetical alien race could destroy humanity without even coming to earth, minimal effort and no more advanced an understanding of physics than that which we currently posses, meaning no magic "cuz I say they have it lul" technology. Any takers?