Your rationale sounds like this...
Exodus 14:11 And they said unto Moses, Because
there were no graves in Egypt, hast thou taken us away to die in the wilderness? wherefore hast thou dealt thus with us, to carry us forth out of Egypt?
Right now in Israel there are many who are secular and don't even believe in God. So God saving Israel supernaturally from the overwhelming force of Gog/Magog will bring Israel to believe in God... although still not believing Jesus is God who entered into the world to add to his being God by becoming a man to die for forgiveness of their sins so that they can have eternal life.
And it says in Ezekiel 39, God destroys Gog's army because He is concerned over His name - which it is that Islam has defamed God by claiming Allah is God of the bible - and has done exceeding wickedness allegedly in the name of God the bible - a lie.
7 So will I make my holy name known in the midst of my people Israel;
[which is to bring all of Israel to believe in God] and I will not
let them pollute my holy name any more: and the heathen shall know that I
am the LORD, the Holy One in Israel.
[the heathen, the muslim nations have polluted God's name - by equating it with Allah of Islam. But Allah is not God, the Holy One in Israel]
________________________________________________________________
In Ezekiel 38, when God supernaturally destroys Gog's army, it will make it known that He is the God of Israel, not Allah of Islam. Gog/Magog is God's judgment on Islam.
23 Thus will I magnify myself, and sanctify myself; and I will be known in the eyes of many nations, and they shall know that I
am the LORD.
________________________________________________________________
Following Gog/Magog, all Israel will believe in God - but not that Jesus is the messiah.
They will think the prince who shall come, the little horn person, into the middle east - the leader of the EU is their messiah. That is a completely separate issue from God's reason for destroying Gog's army; so your question (assertion) is not correctly based.
It will be a colossus error Israel makes in thinking the little horn person is their messiah and anointing him the King of Israel... that ultimately 2/3 don't make it through the great tribulation. The great tribulation results in a big portion of the entire world population dying.
Upon embracing the Antichrist, thinking he is the messiah, they and the world, many falling away from Christianity from believing that Jesus is the messiah - to choose instead the Antichrist - will believe they have entered the messianic age of peace and safety. Before, the world is plunged into the early years of the Day of the Lord.
So your question (assertion) is wrongly based. It is not God saving Israel from the invasion of Gog/Magog. But, in the aftermath, Israel's decision to embrace the Antichrist as their messiah - that leads to all the destruction that comes upon them, and they shall not escape, it says in 1Thessalonians5.
In the middle of the seven years, they turn to Jesus, and he rescues the 1/3 that survive the great tribulation. Them who are martyred for receiving Jesus and remaining faithful to him - have their bodies resurrected to their eternal life bodies in Revelation 20:4-6.