I will not even pretend to understand your starting with India, and with the issues that you have mentioned, and with your omission of the very long tradition of peaceful and friendly relations between India and Afghanistan, since long before the coup by Sardar Daoud, the take-over by the Communists, and the incursion of the Soviet Union. Considering that these relations existed, at a time that Afghanistan was on bad terms with Pakistan, it is not clear why any good links with Afghanistan should cause surprise and alarm in Pakistan. This is not the first time, and I am sure that this will not be the last time to have to point out that Pakistan's attitude towards India is formed to a large extent by Pakistan's self-knowledge; knowing that one has done one's best to harm one's neighbour, using both overt and covert methods, is a powerful reason to believe that the neighbour in question must be doing the same thing. If it is right for Pakistan to scheme and conspire against India, what could be more natural than for Pakistan, and Pakistanis, to think that India was already begun to scheme against Pakistan?
In this state of mind, the truth does not matter. Speculation and uneasy consciences do.
I am sorry that the good relations that some of us sought to infuse into this lively forum should have had so brief a life.