Allah has sent El Eslam to all humanity .That's why He addresses all people in El Quran.He says(O people! Surely the Messenger has come to you with the truth from your Allah, therefore believe, it is better for you . And if you disbelieve, to Allah belongs what is in the heavens and on earth, and

 (Allah is - All- knowing, All-Wise) (surah 4-verse 170