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).
(70) Iskaga tag Kuwa ka Yeeshay Diintooda Ciyaar iyo Madaddaalo kuna Kadsoomay Nolosha Dhaw Xusuusina intaan laga Abaalmarinin (Loa Xabisin) Nafi waxay kasbatay lyadoon Lahayn Eebe ka sokow Wali «Sokeeye» iyo Shafeece midna.