May you all have peace! I first want to say that I actually feared that the thread would go this way - turn into a "you people (believers) are stupid and irrational and need to have your heads checked" fest, in spite of the original (and sincere) questions asked by dear Nick (the greatest of love and peace to you!). If some of you recall, HE asked... and did so as to "sincere people":
How does one go on believing in Yahweh and the Bible when the evidence against the legitimacy of either is so astonishingly overwhelming and relentless? Is it just cognitive dissonance, or is there something more to it? How is it possible for you to go on believing what you believe?
Some of us have deigned to respond to Nick, but the fact that so few of us have is merely evidence that others assuredly saw... and feared... what I did... and so refrained. I say this so that some of you don't fool yourselves into thinking more didn't respond because they had no response; they didn't... because they knew what would "come out [of]" you. The usual: rudeness, disdain, even contempt. For those of you who can't see this about yourselves... I WOULD say "Just look in the mirror," but I don't think your own blindness will allow you to do so. Again, for ME, I would rather believe and put my faith in the FSM... than join you in your "holier-than-thou" (and, yes, that IS what it is)... mannerisms. If, due to your understanding of what you [think you] understand... makes you "superior"... HOW, I ask AGAIN... does that make YOU any BETTER than those of, say, the WTBTS... who think THEY'RE "better"... because of what they [think THEY] understand? Same old, same old... just from a different camp, IMHO.
Now, then, dear Nick, you ask:
why did God choose to have his showdown with Satan on the planet Earth in our time?
As dear tec stated (the greatest of love and peace to you, as well, dear one!)... not sure what "showdown" you're speaking of. But I can share with you what my Lord has shared with ME as to why here and now:
The "here" is because this is the place... in the universe... that He specifically created to hide the seed (of the Woman)... from its enemies in the spirit realm. Why hide them? Because there are those in the spirit realm seeking to destroy them... before they can be fertilized (with God's seed/semen, holy spirit)... and born (again) AS spirit SONS (versus angels/servants). He created a "universe" of physical matter... and made it vast... so that the seed wouldn't be easily found. Unfortunately, one of those He put in charge of protecting the One who protects that seed... a spirit being named Belial (known to you as "Satan" and "Devil")... not only betrayed that seed, and its "Cover"... but the Most Holy One of Israel, Himself.
We were placed here... in physical vessels... that "hide" the SPIRIT beings that we all are. Since the flesh HIDES what we truly are ON THE INSIDE, Belial and HIS angels... cannot readily tell who's who. So, using their own (others in physical vessels - humans, in general)... they have, starting with Cain... gone "smashing" (killing, maiming) such VESSELS... in order to try and annihilate that seed.
Now, it's NOT the killing/maiming of the vessel that causes such annihilation - the flesh has sin IN it (in the long garment of skin inherited from Adham) and so gets sick, diseased, ages, dies. No, it is what such killing/maiming CAUSES: ones to answer the challenge made by that Betrayer as he SAID they would: curse God to His FACE. THAT is how one puts themselves in line for annihilation. Satan doesn't want your flesh - the flesh is of NO use, at ALL. He wants your SPIRIT... the man you are ON THE INSIDE (of your body, the physical vessel).
Unlike the body, which he can "touch" (Job 1:11, 12; 2:5-7)... he CANNOT touch our spirits! That is something we have to GIVE. And we do so... when we turn away from God by CURSING Him... to His face! And when we blaspheme... against His Holy Spirit, the Holy One of Israel, JAHESHUA, His Son and Chosen One.
Why not somewhere else in the universe? Because a tiny planet in a solar system of gazillions of solar systems, in a galaxy among billions of galaxies... is where He felt they would be best hidden. And they were... until the betrayal.
Why now? Because, due to that betrayal... such seed are no longer safe. First, their enemies now know where they reside... and have come after them. And there is not merely one: there are MANY. Which is why the Father said to the Son, "Sit at my right hand until I place ALL of your ENEMIES under your feet." And why Paul wrote that we have "a wrestling NOT against flesh and blood, but against... wicked spirit forces..." among other things. In addition, at SOME point, ALL of mankind would eventually lose faith... and, given the right circumstances... "curse God." Some here have already met that fulfilled that challenge and prophecy.
Why so long? Because... all of the seed have not come into existence, yet. All have not been born... in the flesh, yet. Which is the ONLY way to save them: if the one(s) carrying them are killed/die before they can come into the physical world, then they are never born... and so can never be born AGAIN... in the spirit. It really is that simple. They were originally placed in Adham, out from whom was taken Eve... who became the [surrogate] mother "of everyone LIVING." So, these must first come to LIFE.
Because the Most Holy One of Israel is the God... of the LIVING.
As for the "showdown" with Satan, I am unaware of any showdown other than the one that resulted in his being cast out of the SPIRIT realm. It was his twin, Michael, the OTHER "protector" of the "Cover"... who battled with him... and prevailed. That event occurred in 30 CE, during the 50 days between my Lord's death... and ascension. Michael is the one who "cleansed" the spirit realm so that my Lord could begin his rule without opposition THERE.
The only other "showdown" that I'm aware of is between each of US... individually... and Satan... regarding his challenge as to each of US.
Finally, I am sure you and others want to know if we are alone, if earth is the only place with [physical] life on it in the universe. My understanding is no, we are not. However, although I have asked, I do not hear any further details on this matter, other than it is not something I need to be concerned with at this time... nor does what is occurring with us (both physically and spiritually) related to what is occurring with THEM. My only conclusion right now is that they have they own physical and spiritual matters... and covenant(s) with God. I do not know if they have some kind of relationship with my Lord, the Son... but my feeling is that they do.
Who knows... perhaps they, too, are seed... hidden wherever THEY are hidden. The physical universe IS vast, after all. But, I don't know. Since I am but a tiny drop in a tiny bucket, however... and have enough trying to keep up with the world I DO live in, both physical AND spirit... I really can't spend too much time mulling over it, if that makes sense.
I hope this helps, truly. And, as always, the greatest of love and peace! Indeed, peace to you all!
YOUR servant and a slave of Christ,