If you asked 1000 Christians if they've heard about the Cross, 1000 of them will say yes absolutely. That's 100%. Literally every single one will be able to at least tell you some details about the Cross of Christ because after all this is the central point in all of the bible.
But if you were to go to those same 1000 Christians and ask them if they know anything about the 42 month siege on Jerusalem by the Romans which ended in the absolute and utter shattering and destruction of the Jewish economy and Jewish people, I'd be shocked if 50 of them even knew about it. That would be 5%.
Why is this event so important?
Well because when Jerusalem fell would be the exact time when the Kingdom was consummated. The saints could not inherit the Kingdom prepared for them until the way into the Holy of Holies was opened up. They were still waiting in Sheol. They had not yet been resurrected. Hebrews chapter 9 is crucial in understanding this. Remember, this book was written roughly 30-35 years AFTER the cross and look what the author says...
"The Holy Spirit indicating this, that the way into the Holiest of All was not yet made manifest while the first TEMPLE was still standing. It was symbolic for the PRESENT time in which both gifts and sacrifices are offered which cannot make him who performed the service perfect in regard to the conscience—concerned only with foods and drinks, various washings, and fleshly ordinances imposed until the time of REFORMATION." Hebrews 9-8-10
He is saying that while the first temple was still standing and while gifts and sacrifices were still being brought to the temple, the way into the spiritual New Covenant Kingdom was not yet open. But all of that would change at the time of the "reformation". When was that? That was the destruction of Jerusalem and the coming of the Lord at the end of the Old Covenant age.
At the end of the same chapter the author writes..
"So Christ was offered once to bear the sins of many. To those who eagerly wait for Him He will appear a second time, apart from sin, for salvation."
Again, the biblical proof for this is abundant. Christ would come a second time in the glory of His Father in judgement. He would put an official end to the Old Covenant and all of its temple elements once and for all. It would be at His return to impose the "reformation", that the saints would be resurrected and would inherit the Kingdom prepared for them.
Daniel chapter 12 places both the resurrection and the inheritance of the Kingdom as being finished when the 42 month destruction on Jerusalem was finished. The very first 2 verses look like this....
"At that time Michael shall stand up,
The great prince who stands watch over the sons of your people;
And there shall be a time of trouble, <-------(Great tribulation)
Such as never was since there was a nation,
Even to that time.
And at that time your people shall be delivered,
Every one who is found written in the book.
And many of those who sleep in the dust of the earth shall awake, <----(Resurrection)
Some to everlasting life,
Some to shame and everlasting contempt." <------(Judgement)
Clearly we see the great tribulation, resurrection, and judgement in there. When we continue on to verses 6 and 7, you'll see exactly how long and when it would be until these wonders were fulfilled.
The angel says that it would be for a period of 42 months (time+ times+ half a time means a year+2 years+half a year, totaling 42 months) and when the power of the Holy people was completely shattered, all of the wonders mentioned above would be finished.
Any quick study of the 42 month siege on Jerusalem within one generation of Jesus ministry will show how this precisely fulfilled both Daniel's and Jesus predictions precisely.
You'll also find perfect harmony with Christ's prediction in Matthew 16:27-28 when He assures them that the resurrection and judgement would occur before some of the men standing there would die. Remember, He said that around AD30. The final destruction occurred at AD70. Makes perfect sense without forcing anything. The chances of some of those men still being alive 40 years later was very strong.
Why is it crucial that we familiarize ourselves with and understand the significance of the AD70 destruction of Jerusalem and the Temple?
It is abundantly clear that the Destruction of Jerusalem was going to signify the following events as being fulfilled:
1) The Great Tribulation
2) The End of the Old Covenant Age
3) The Resurrection
4) The Judgement
5) The saints (both living and dead) inheriting the Kingdom
6) The Coming of the Lord for salvation and as King of His Kingdom
If we neglect to educate ourselves about this cataclysmic and most crucial event in biblical history, then we will fail to see the fulfillment of all of the wonderful promises that we enjoy today as members of the Kingdom of God.