When did was the fig tree destroyed? When did Israel cast her untimely figs? When did Jesus say no fruit would grow on the fig tree FOREVER? Forever means forever, there is no second go round at the end where the fig tree will produce fruit again.
The on-going problem is your interpreting the fig tree as referring to Israel. In addition, you are misapply scriptures that have nothing to do with each other. When Jesus cursed the fig tree, he was just cursing the fig tree. There was no underlying reference to Israel in what he did.
Also, the reference to the 6th seal regarding the unripe figs, is just an illustration of how the stars (meteorites, asteroids) are going to fall to the earth. Below is the scripture:
"And when I saw the Lamb open the sixth seal, there was a great earthquake, and
the sun became black like sackcloth of goat hair, and
the whole moon turned blood red, and the stars of the sky fell to the earth, like unripe figs dropping from a tree shaken by a great wind. The sky receded like a scroll being rolled up, and every mountain and island was moved from its place."
The above is a literal event that is going to take place when the 6th seal is opened. Notice in the scripture that the sun will be darkened and the moon will be turned blood red. The fact that the scripture is speaking about what is literally going to happen to the sun and moon, would demonstrate that the reference to the stars must also be literal and not symbolic representing Israel. These are events that will be literally happening to the sun, moon and the stars. And since we know that it can't be referring to literal stars, then it must be the other objects in heavens such as meteorites or asteroids. Below is another example:
Matthew 24:32
"Now learn this lesson from
the fig tree: As soon as its branches become tender and sprout leaves, you know that summer is near. So also, when you see all these things, you know that He is near, right at the door."
Do you think that the above scripture that the mentions the fig tree, that it is referring to Israel?
Luke 21:29
"Then Jesus told them a parable: “
Look at the fig tree and all the trees. When they sprout leaves, you can see for yourselves and know that summer is near.
31So also, when you see these things taking place, you will know that the kingdom of God is near.
And now with the addition of "and all the trees" is the reference to the fig tree still referring to Israel? By including "all the trees" it becomes clear that the scripture is just an example to show that in the same way that when the trees blossom it is a sign that summer is near. In the same way, when all of those signs begin to take place, you can know that the end of the age is near. Point being that, it is just a comparative example and has nothing to do with Israel being represented by the fig tree.