Those towns are not destroyed where the message of Haqq is'nt conveyed

O you assembly of jinn and mankind! "Did not there come to you Messengers from amongst you, reciting unto you My Verses and warning you of the meeting of this Day of yours?" They will say: "We bear witness against ourselves." It was the life of this world that deceived them. And they will bear witness against themselves that they were disbelievers

This is because your Lord would not destroy the (populations of) towns for their wrong¬doing (i.e. associating others in worship along with Allâh) while their people were unaware (so the Messengers were sent).

al An'aam 130-131