God send 124000 messengers. In surah Yasin , ayat 6 'so that you (the prophet) may warn a people whose fathers were not warned', How do we reconcile the fact that Warners are sent to all nations. If people are not warned, does it follow than Allah will judge them accordingly even if they are not worshipping the One True God?

Each of us will be judged by Allah according to our circumstance. They will be judged depending on whether they are exposed to the message or not. And if yes, did they make good use of it or just reject it for the sake of rejecting.