I don't really think he wants them to know 'the truth' or anything. I think he just wants them to believe what he wants, and he does in such a way that it's not gonna work. If you attack someone for believing what they believe, it will never work.
Furthermore, I don't see how Javed is writing for Pakistanis' amusement. That's your opinion, but I can say the same about someone like Paracha. Yes I know he doesn't write for an Indian website but nevertheless, he has huge indian fan base and in this day and age of internet, it doesn't really make much difference where the articles are published.
Your whole premise is based on the idea that the guy is not credible because he writes anti-India stuff. And that obviously is not a very good premise.