No proof has ever been shown to anyone.
However, a lot of effort is being spread to blame India.
However, a lot of effort is being spread to blame India.
The Indian complicity is known and proofs of this have been shown to India's American and other friends. However, if a certain threshold is crossed, which I don't know, may have been crossed, India has a huge soft underbelly which can be exploited, no matter how much the Indians feel that they are ready.
Moral and diplomatic support can then be provided with such a vigor, the likes of which may not have been witnessed before. Though Joe Shearer says it is "Slippery, Very" - indeed India is treading on a slippery and indeed very slippery ground here.