i am a Muslim, and i am personally appreciate Mr Rajapaksha to this kind of work (it could be a different agenda behind on it)
As per islam we never ever pray for any Dead body!
We never ever ask help for Any dead person!
Dead Bodies whoever it is,
he could be a Nabi, Imam, Moulavies, Shahaabaas, Auliyas, they dont have any Power. they cannot hear, they cant do anything. simply they are dead.
we can ask help only from God, we can pray only for God.
this is all Indians culture.
Some uneducated muslim idiots adopt that system. and they do all these kind of thing just only for money.
Regards