I can appreciate the "sanity test" that you are referring to. I was once at the place where Matthew 24 made very little sense to me according to any eschatalogical system; and I know them all. That is until I started studying it and weighing the options. It has taken a long time but I am now completely comfortable with everything prior to verse 34 as being fulfilled within that present generation and being able to back it all up with scripture.
For me the "sanity test" has to do with elegance, simplicity, reason, and knowledge of scripture. A phenomenon that I have noticed over the years is how egocentric our view of Christianity is, especially with prophecy and how it skews our expectations. It becomes impossible, sometimes, for Christians in our culture to accept that our generation may not remarkable in God's economy.
"God just HAS to do something big for me to see because my expectations of Him demand it!!"
There is another phenomenon that is more sinister. Without the excitement of futurism, they see little beauty in salvation.
These things would take years for us to consider. But the short answer, for me, is that none of those things occur when He returns because they have either occurred or are now in process. In other words, He is ruling now and He returns at the end of time to take out those who are still alive. The carnage in the Kingdom of God is spiritual, just like the Kingdom is spiritual.
God has made things spiritually right. He has made a way for us to fellowship with Him by grace through faith in His Son from now into eternity because that is His only purpose. Those who are looking for Him to make things physically right do not understand His purposes. This world is destined to be burned up.
Because we are obviously of different persuasions on this, I doubt we can make much of a dent in it. And I agree with you that it seems, on the surface, that much of the first part of Matthew 24 cannot have happened.
Matthew 24:21 KJV(21) For then shall be great tribulation, such as was not since the beginning of the world to this time,
no, nor ever shall be.
But perspective, again, World War One, the war to end all wars? World War Two, proving that the War to end all Wars was not the War to end all Wars? The Jewish Holocaust? The Russian Holocaust which killed far many more than the Jewish Holocaust?
The tribulation that Jesus is talking about is a tribulation to end all tribulations. If that tribulation is a war, it is the war to end all wars. The destruction of Jerusalem though prophesied both directly and indirectly was not the tribulation to end all tribulations.
https://www.ushmm.org/confront-genocide/cases/cambodia/introduction/cambodia-1975
From April 17, 1975, to January 7, 1979, the Khmer Rouge perpetrated one of the greatest crimes of the 20th century. Nearly two million people died under the rule of the fanatical Communist movement, which imposed a ruthless agenda of forced labor, thought control, and mass execution on Cambodia.
You were speaking of "egoCentric Christianity..." but what of Jew-Centric? Do atrocities and genocides not matter or really count unless it happens to Jews? Is it only tribulation if it happens to those who observe sabbaths and abstain from meats unclean?
I sympathize with wanting to make the prophesies make sense that we understand now, but perhaps it might also be considered ego-centric that we (today) must understand all things. Some things may not be fully understood until after the fact, but it should be worth consideration that a fulfilled prophecy should make better sense after the fact than before. A proposed fulfillment shouldn't contradict its conditions.
As for your concerns about futurism and beauty of salvation, or God ruling now, I would say it should be obvious that Christ has not returned and God is not ruling now.
Matthew 26:29 KJV
(29) But I say unto you, I will not drink henceforth of this fruit of the vine,
until that day when I drink it new with you in my Father's kingdom.
None of those that heard that statement have drunk new wine with Christ in his Father's kingdom. They are dead until the resurrection, and we know that resurrection is a literal resurrection because we are to be raised as Christ was raised. Christ was
not (correction) invisibly raised as a ghost or a warm feeling in someone's heart, he was seen, he spoke, and he had substance.
Psalms 82:8 KJV
(8) Arise, O God, judge the earth:
for thou shalt inherit all nations.
Matthew 5:5 KJV
(5) Blessed are the meek:
for they shall inherit the earth.
Philippians 2:10-11 KJV
(10) That at the name of Jesus every knee should bow, of things in heaven, and things in earth, and things under the earth;
(11)
And that every tongue should confess that Jesus Christ is Lord, to the glory of God the Father.
That hasn't happened yet. The meek do not inherit the earth, it is seized by the strong. God has not arose to judge among the gods, and inherited all nations. Every tongue certainly does not confess that Jesus Christ is Lord.
Isaiah 11:6-9 KJV
(6) The wolf also shall dwell with the lamb, and the leopard shall lie down with the kid; and the calf and the young lion and the fatling together; and a little child shall lead them.
(7) And the cow and the bear shall feed;
their young ones shall lie down together: and the lion shall eat straw like the ox.
(8) And the sucking child shall play on the hole of the asp, and the weaned child shall put his hand on the cockatrice' den.
(9)
They shall not hurt nor destroy in all my holy mountain: for the earth shall be full of the knowledge of the LORD, as the waters cover the sea.
That hasn't happened yet either. Evil flourishes, the world we see around us is reigned by spiritual powers but those are not the powers of God. The devil is not yet bound, this is his world and we can see around us and see who it ultimately worships by its fruits and actions.
Ephesians 6:11-12 KJV
(11) Put on the whole armour of God, that ye may be able to stand against the wiles of the devil.
(12) For we wrestle not against flesh and blood, but against principalities, against powers,
against the rulers of the darkness of this world,
against spiritual wickedness in high places.
If I am to summarize, our faith in Christ should enable us to expect far far better of the coming kingdom of the King of Kings and Lord of Lords than something invisible alongside a cesspool of evil and blasphemy. "All things under his feet" it says, 1 Corinthians 15:27.
Hebrews 2:8 KJV
(8) Thou hast put all things in subjection under his feet. For in that he put all in subjection under him, he left nothing that is not put under him.
But now we see not yet all things put under him.
Be willing to expect more. This world is not under his feet yet... but it will be.