This quote is from the link you posted. Pakistan supported Hekmatyar bombarded Kabul and started civil war !!
Civil war in Afghanistan (1992–96) - Wikipedia, the free encyclopedia
According to
Peter Tomsen, the
United States Special Envoy to Afghanistan, neighboring Pakistan had tried to install Hekmatyar in power in Afghanistan against the opposition of all other mujahideen commanders and factions as early as 1990. In October 1990, the
Inter-Services Intelligence had devised a plan for Hekmatyar to conduct a mass bombardment of the Afghan capital Kabul, then still under communist rule, with possible Pakistani troop enforcements. This unilateral ISI-Hekmatyar plan came although the thirty most important mujahideen commanders had agreed on holding a conference inclusive of all Afghan groups to decide on a common future strategy. Tomsen reported that the protest by the other mujahideen commanders was like a "firestorm".
Ahmad Zia Massoud, the brother of
Ahmad Shah Massoud, said that his faction strongly opposed the plan and like other factions would take measures if any "Pakistani troops reinforced Hekmatyar".
Abdul Haq was reportedly so angry about the ISI plan that he was "red in the face". Nabi Mohammad, another commander, pointed out that "Kabul's 2 million could not escape Hekmatyar's rocket bombardment – there would be a massacre." Massoud's, Abdul Haq's and Amin Wardak's representatives said that "Hekmatyar's rocketing of Kabul ... would produce a civilian bloodbath."The United States finally put pressure on Pakistan to stop the 1990 plan, which was subsequently called off until 1992.
