Are you forgetting the authorised armssales to the PRC from the late 70s till Tianammen????If im not mistaken,Bill Clinton was a nobody back then & republican presidents held the White House for a good chunk of that period.Sales of items like torpedoes(check out China's current ASW torp),helos,LM-2500 gas turbines,avionics & dual use systems took place during that period.It was around the sametime that Deng XioPing realised the pathetic state of the PLA & saw the sore need for modernisation.So was the US & Europe(yep France,Britain,Germany all had their pies too) responsible in part for helping in the start of the modernisation of the PLA???It's something a lot of folks won't like to ponder over.
Non-sequitur. Big difference building competitors to the Soviet Union and continuing to build them after the Soviet Union. Also, when people you aid later turn on you, the treachery and ingratitude also changes the equation. We have been fortunate that for the last 100 years recipients of aid, Russia, Germany, Japan, China, the mujahadeen, have all been stupid enough to act or telegraph their real or new intentions before gaining a decisive advantage.