You have to understand. Iran has always supported Persian speaking groups in Afghanistan. Hence they are troubled by the defeat of Ahmad Masooud and Amr Saleh. It is not only India that is blaming Pakistan but also the National Resistance Movement of Afghanistan. However, the Iranian government has only said that these reports will need to be investigated. They have not diectly blamed Pakistan and are still engaging in Pakistan's regional efforts to make things easier for Afghanistan. This propaganda is going to impact people who are hurt or defeated in the process including the Americans, Iran, Tajikistan, India etc. India wants to exploit it in collaboration with like-minded Afghans against Pakistan, but I think this is a temporary phase and will soon pass. They will all recognize Afghanistan soon to benefit from trade and transit opportunities.