that's your opinion, but the facts are out there for everyone to see. Your favor will be returned by Afghans, today or in 200 years.
Nope, these are facts, bitter as it may be for the current generation of Afghanistan to digest them.
Some excerpts from "The Forgotten History of Afghanistan-Pakistan Relations" by Daveed Gartenstein-Ross and Tara Vassefi
"From a legal perspective, Afghanistan’s claim about the illegitimacy of its border with Pakistan was rather weak. Though Afghanistan claimed that the border had been drawn under duress, it had in fact confirmed the demarcation of this international frontier on multiple occasions, including in agreements concluded in 1905, 1919, 1921, and 1930. But the weakness of Afghanistan’s legal case took a backseat to the historical connection it felt to the Pashtun areas, and the strategic benefits it would derive from expanding its territory
This brings us to the episodes in the history between Afghanistan and Pakistan that have so often been missing from contemporary discourse: not only do the two countries have a disputed border,
but Afghanistan has rather aggressively pursued actions designed to expand its territory at Pakistan’s expense. ...
It was Afghanistan rather than Pakistan that chose to make this border dispute, and the issue of Pashtunistan, so central to the two states’ relations.
At the outset, Afghanistan was the only country to vote against Pakistan’s admission into the United Nations ...
George Montagno, who served as a visiting professor of American history at the University of Karachi, has noted that for years after Pakistan’s creation,
Afghan agents operated within the Pashtun areas, “distributing large amounts of money, ammunition and even transistor radios in an effort to sway loyalties from Pakistan to Afghanistan.” ...
In late September 1960, an Afghan lashkar (irregular forces) crossed into Pakistan’s Bajaur area. Pakistan’s government announced that the lashkar “clashed with loyal tribesmen and fled after suffering heavy casualties.”18 But Pakistan alleged that conventional Afghan military resources, including tanks, had also massed on the Afghan side of the border near Bajaur.19 What Afghanistan’s official news agency described as “a major battle” eventually broke out between the two sides.20 Pakistan bombarded Afghan forces using its airpower; rather than escalating the conflict, this quelled hostilities, at least for the time being."