Dear Iftekhar Hai,
I had thought that you read the Quran with intense interest and explore all the ins and outs of a text. Looks like you have not.
You cannot read one verse in isolation and try to make sense out of it.
Verses have been revealed in groups and sometimes in full Suras. That means every group of verses has a context, both historical as well as circumstantial. You have to have the full background of each and every revelation (not just one verse) to get the full meaning and the complete implications of each revelation.