This is because your Lord would not destroy the (populations of) towns for their wrong-doing (i.e. associating others in worship along with Allah) while their people were unaware (so the Messengers were sent).
Wanan kuwa sabõda Ubangijinka bai kasance Mai halaka alƙaryõyi sabõda wani zãlunci ba ne, alhãli kuwa mutãnensu sunã jãhilai.