And if We had wished, We could have sent into every town a warner.
This verse is a reply to those who consider Messenger Muhammad is deputed to a particular group of people. Today, the Arabic Quran reading Fujjar who hide and reject Adhikr are having a strayed belief that Messenger Muhammed is sent for them only by rejecting verses 7: 157-158; 21: 107; 25: 1; 34: 28 and 42: 7. These true disbelievers are trying to extinguish Lord’s Light Adhikr, but Lord will fulfill His Light throughout the world even though the disbelievers are hating It as explained in verses 9: 31-33.
Only believer who testifies Adhikr will consider that Lord of the universe has deputed all 313 Messengers with Adhikr into entire mankind to teach them that there is no deity except Lord and so to serve Him alone as explained in verses 21: 24-25. See explanation 6: 92; 12: 108 and 13: 40.