Actually the problem is that India and particularly Tamil Nadu, has split loyalties in the Sri Lankan civil war. Despite LTTE killing Rajiv Gandhi, there is still support for LTTE among Tamil groups. Moreover, India is still adopting a policy that both groups should go back to the negotiating table and not fight.
Thus it is because India refuses to sell SL the required weapons that SL has to look to Pakistan.
Personally I have always considered countries like Sri Lanka and Nepal as logical extensions of India - our culture and broad national interests coincide more than any other country. I wish India did more to make the Lankans feel India is a genuine big brother, rather than a big bully.
