You are really confused on this. Nowhere in the canonical scriptures is Israel called the "fig tree". That is found in the gnostic writings, the heretics! It is in the Apocalypse of Peter -
http://www.gnosis.org/library/apocpeter.htm
ALL those things are that which happens in that generation, not some generation thousands of years in the future from Jesus words. For those weak in English grammar and reading comprehension, the easier translations spell it out -
"Truly I tell you: the present generation will live to see it all." (Matt 24:34 REB)
"I tell you in solemn truth that the present generation will certainly not pass away without all these things having first taken place." (Matt 24:34 Weymouth)
Joseph Benson an 18th century Methodist remarked on this verse -
“It is to me a wonder,” says Bishop Newton, “how any man can refer part of the foregoing discourse to the destruction of Jerusalem, and part to the end of the world, or any other distant event, when it is said so positively here in the conclusion,
All these things shall be fulfilled in this generation. And it seems as if our Lord had been aware of some such misapplication of his words, by adding yet greater force and emphasis to his affirmation, Matthew 24:35 -
"Heaven and earth will pass away, but My words will not pass away."
https://www.studylight.org/commentaries/eng/rbc/matthew-24.html
What a perversion of God's word have modernists made of this passage! Seek the old paths folks, don't let modernists mislead you.