Dispensationalism does Not teach the bolded part.
It teaches God is dealing with a new world order. Where each nation, not just Israel, is fulfilling its purpose and worshiping God
Actually you answered your own question.
It is also found in leviticus 26
And after all this, if you do not obey Me, but walk contrary to Me,
28 then I also will walk contrary to you in fury; and I, even I, will chastise you seven times for your sins.
29 You shall eat the flesh of your sons, and you shall eat the flesh of your daughters.
30 I will destroy your high places, cut down your incense altars, and cast your carcasses on the lifeless forms of your idols; and My soul shall abhor you.
31 I will lay your cities waste and bring your sanctuaries to desolation, and I will not smell the fragrance of your sweet aromas.
32 I will bring the land to desolation, and your enemies who dwell in it shall be astonished at it.
33 I will scatter you among the nations and draw out a sword after you;
In both of these cases. God promises that for them to live in peace in the land. They had to obey hi, If they turned from him, he would turn in them, up to and including destroying their high places (like the temple) and tearing down their cities and scattering them in Gentile nations. As punishment.
This also happened three different times Assyria and Northern Israel, Babylon and southern Israel, As prophesied by Jeremiah and at the end of that time, was prayed hard by Daniel the prophet trying to make intercessary prayer, And God in his love sending gabriel down to say they will not restored now. But they will be given 70 weeks. At the end of the time Israel will do the following
“Seventy weeks are determined For your people and for your holy city,
The 70 weeks are for Daniels people. And his Holy city (jerusalem)
To finish the transgression, To make an end of sins, To make reconciliation for iniquity, To bring in everlasting righteousness,
To seal up vision and prophecy, And to anoint the Most Holy.
This would be a different study, But you can not take dispensationalism out of one small passage, it is a whole bunch of scripture put together.
Back to lev 26, It says if Israel repents, and they confess their sins and their father’s sins. God will remember his covenant with their fathers.