I have nothing against that marriage Fraz. But you make it sound as if it was a love marriage. It wasn't. It was arranged by the families who are and have been very close for a very long time. In fact, they had seen Mahrukh at various marriages and social functions where the families met. So they weren't boycotting Dawood socially or something.
Dawood left India at around the time he was accused in the Bomb blasts case which was much before this betrothal took place but it cant be anyone's case, least of all that of the Indian Government, that no one should have any relationship with anyone accused of any crime, howsoever serious, In fact, Dawood's sister has been in Mumbai for years after he left as have been other family members. They are not social outcasts.
Javed is not defensive about his relationship with Dawood and it fine because that isn't against the law or something). No need for us to be defensive on his behalf.
I think it is Javed's personal decision to arrange for his son's marriage and thats it - nothing more nothing less.