To have not been converted is a different state than one of apostasy.
Christ said this:
Matthew 11:21-23
Douay-Rheims
21 Woe to thee, Corozain, woe to thee, Bethsaida: for if in Tyre and Sidon had been wrought the miracles that have been wrought in you, they had long ago done penance in sackcloth and ashes.
22 But I say unto you, it shall be more tolerable for Tyre and Sidon in the day of judgment, than for you.
23 And thou Capharnaum, shalt thou be exalted up to heaven? thou shalt go down even unto hell. For if in Sodom had been wrought the miracles that have been wrought in thee, perhaps it had remained unto this day.
Now, what can be worse than the destruction of the four towns as recorded in the Old Testament? In Genesis, Sodom and Gomorrah as well as Admah and Zeboim, were destroyed because of the sin of sodomy. Christ's reference to Tyre could have been a historical note on Alexander the Great's razing of the city, but an irony on Christ's part, as this was a Gentile city with Jewish inhabitants and people responded to His mission there.
Sidon was another Gentile city with some Jews of wealth, like Tyre. This city was the home of Jezebel, the worst queen of Israel, and an idolater.
Christ visited the areas around Sidon and Tyre as noted in Mark 3:8 and Luke 6:17.
Mark 3:8
Douay-Rheims
8 And from Jerusalem, and from Idumea, and from beyond the Jordan. And they about Tyre and Sidon, a great multitude, hearing the things which he did, came to him.
Christ emphasized to the Jews of the cities mentioned, Capharnaum, Corozain, and Bethsaida, that He worked more miracles for them than in those other places and yet, these so-called faithful cities did not convert.
One could substitute modern cities for these names in the "Woe" passage above.
London, Paris, Cooperage, Brussels, Madrid, or Lisbon, wherever Christianity was strong in the past and now is no longer.
Do readers honestly think that God will ignore the sins which cry out to God for vengeance? Abortion, sodomy and denying the fair wages to the poor, as well as not caring for the widow and orphan....