Yes, but that remnant is saved collectively. Scripture tells us Jesus steps down on the Mt. of Olives and it splits and they run in for protection. It also tells us that Jesus returns in the clouds, in great glory with an army that saves Jerusalem at the time of Armageddon.
It's true that he'll intervene for Jerusalem at the time of the battle of Armageddon, but, again, not all of the Jews in Jerusalem will be saved at that time.
In fact, Jesus told the believing Jews to flee from Jerusalem when they behold certain prophetic signs, and those who don't flee shall be destroyed.
For example:
Matthew chapter 24
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15]
When ye therefore shall see the abomination of desolation, spoken of by Daniel the prophet, stand in the holy place, (whoso readeth, let him understand)
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16]
Then let them which be in Judaea flee into the mountains:
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17] Let him which is on the housetop not come down to take any thing out of his house:
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18] Neither let him which is in the field return back to take his clothes.
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19] And woe unto them that are with child, and to them that give suck in those days!
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20] But pray ye that your flight be not in the winter, neither on the sabbath day:
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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.
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22] And except those days should be shortened, there should no flesh be saved: but for the elect's sake those days shall be shortened.
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23] Then if any man shall say unto you, Lo, here is Christ, or there; believe it not.
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24] For there shall arise false Christs, and false prophets, and shall shew great signs and wonders; insomuch that, if it were possible, they shall deceive the very elect.
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25] Behold, I have told you before.
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26] Wherefore if they shall say unto you, Behold, he is in the desert; go not forth: behold, he is in the secret chambers; believe it not.
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27] For as the lightning cometh out of the east, and shineth even unto the west; so shall also the coming of the Son of man be.
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28] For wheresoever the carcase is, there will the eagles be gathered together.
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29] Immediately after the tribulation of those days shall the sun be darkened, and the moon shall not give her light, and the stars shall fall from heaven, and the powers of the heavens shall be shaken:
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30] And then shall appear the sign of the Son of man in heaven: and then shall all the tribes of the earth mourn, and they shall see the Son of man coming in the clouds of heaven with power and great glory.
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31]
And he shall send his angels with a great sound of a trumpet, and they shall gather together his elect from the four winds, from one end of heaven to the other.
"The abomination of desolation" of which Daniel foretold will ultimately "stand in the holy place" or within a rebuilt temple in Jerusalem.
When that occurs, the believing remnant in "Judaea" or "Judah", which is where Jerusalem is located, will "flee".
The others?
Well, it won't bode well for them.
You'll also notice the "great sound of a trumpet" at Christ's return because, again, he returns on the Feast of Trumpets which is a Falltime Feast.
Anyhow, this conversation has derailed, I think, from the OP's original intent.
To my original point, I don't expect to see any nuclear wars anytime soon.
What I do expect to see is a coming rebuilt third Jewish temple and the antichrist ultimately declaring himself to be "God" from within the same. Of course, Christ shall return, as the prophesied son of David, to ultimately claim his rightful place upon that throne.
This is part of what I'm watching for.