this is a common misconception, mainly peddled around india. the truth is these people had always fought rather then accept foreign rule. unlike its neighbours they were not the subject of foreign occupation even during british rule of hindustan. go check how long the brits fought to capture this area. then when pakistan was formed it was these tribesmen that defended pakistan against the indian army even before pakistan army was formed. they also played a major role in the azaadi of azad kashmir, northern areas
so saying pakistan created them is not an accurate statement even if youve become accustomed to hearing it
the russian army was just one of many victims. pak hardware support just speeded up the process