As we approach the anniversary of Israel becoming a nation, I felt this topic would make for a good discussion.
The United Monarchy
Saul was king of the first Jewish Kingdom, later known as the United Monarchy, followed by David. We will specifically be considering the timeline of Jerusalem being the capital of the undivided Kingdom. I feel we can remove Saul from this timeline. Jerusalem is under Jesubite control (Judges 1:21) until David conquers it; naming it the City of David.
2 Samuel 5:7
>Nevertheless, David captured the fortress of Zion, that is the city of David.
We also know that David ruled from Jerusalem for ~33 years.
2 Samuel 5:4-5
>^(4) Now David was thirty years old when he became king, and he reigned forty years. ^(5) At Hebron he reigned over Judah seven years and six months, and in Jerusalem he reigned thirty-three years over all Israel and Judah.
Following David, Solomon ruled 40 years.
1 Kings 11:42
>Thus the time that Solomon reigned in Jerusalem over all Israel was forty years.
At this point, the crux of this post comes into play. It's crucial we understand this verse to it's roots.
Psalm 90:10
>As for the days of our life, they contain seventy years, Or if due to might, eighty years, Yet their pride is but labor and wickedness; For soon it is gone and we fly away.
Days;yom
>From an unused root meaning to be hot.
Life;Shanah
>whole age, long, old, yearly.
Or if due to might;geburah
>force (literally or figuratively); by implication, valor, victory -- force, mastery, might, mighty (act, power), power, strength.
>A primitive root; to urge severely, i.e. (figuratively) importune, embolden, capture, act insolently -- overcome, behave self proudly, make sure, strengthen.
labor;amal
>labor, trouble, mischief, fruit of my labor, toil, wickedness, anguish.
wickedness;aven
>From an unused root perhaps meaning properly, to pant (hence, to exert oneself, usually in vain; to come to naught); strictly nothingness; also trouble. Vanity, wickedness; specifically an idol.
Getting back to Solomon, we can see this prophecy in action.
1 Kings 11:4
>Now it happened at the time that Solomon was old, his wives turned his heart away after other gods; and his heart was not wholly devoted to Yahweh his God, as the heart of David his father had been.
1 Kings 11:7
>Then Solomon built a high place for Chemosh the detestable idol of Moab, on the mountain which is east of Jerusalem, and for Molech the detestable idol of the sons of Ammon.
We don't know exactly when the idolatry began, except that it was near the end of his reign. We know from before, Solomon's death occurred ~73 years after Jerusalem was conquered. We also know that the wickedness from the prophecy, concerning the forcing of an age beyond 70 years, is connected to idolatry.
After Solomon, God declares that He will take the Kingdom from Solomon (1 Kings 11:11) and after the Kingdom is divided between Jeroboam and Rehoboam, they both continued in their own forms of idolatry (1 Kings 12:28–30 and 1 Kings 14:21-24). At this point, the Kingdom is no longer united so it's safe to say this fig tree age has ended here.
The Hasmonean Dynasty
The Hasmonean Dynasty lasted 77 years (140–63 BC). Truthfully I'm not very knowledgeable on this one, but a civil war began some time in the last 4 years of the Dynasty. It ended after one side of the civil war went to Rome for aide, which quickly led to Pompey the Great capturing Jerusalem. Even without written testimony, it would be logical to assume Roman influence (and subsequent idolatry) grew more prominent in the years leading up to this.
Summary
The big point in all of this is that when a Jewish Kingdom is ruled under Jerusalem, it appears they are tested with idolatry and foreign influence after 70 years. All the times in the past, instead of returning to God, these leaders have dug their heads deeper into the laps of their foreign gods.
We see this happening again today, with all the blatant Trump worship taking place in Jerusalem. One hope for this post is to get across the point that things could pick up at any point during this eighth decade.
We know what signals the end of this third kingdom. The AC will stand in the Holy Place and declare himself God. One of the signs we have been given is the blatant idolatry we've witnessed during Israel's eighth decade.
The Trump idolatry really kicked off after Trump made Jerusalem the capital of Israel, during their 70th year.