Thanks for the clarification Brother.
Viewing the discussion between Israr and Ghamidi, one got the impression that the letters were sent to accept Islam or....!!!
Mullahs still believe that it was either accept, submit or fight. Taking it further some of them believe that this is to be done even today (if Muslims have the power). Dr. Israr had to admit that in the same way, the Muslims have to submit to others demanding the same of them!!!