if allah should take people to task for what they have earned he would not leave one creature that crawls upon the face ! but he is deferring them to a named time. and when their time comes indeed allah is the seer of his worshipers.
ولو يؤاخذ الله الناس بما كسبوا ما ترك على ظهرها من دابة ولكن يؤخرهم إلى أجل مسمى فإذا جاء أجلهم فإن الله كان بعباده بصيرا