Sunday Surkhi--Nuclear NPT and AQ Khan

Since the release of Dr. A Q Khan from restrictions of being house bound by Pakistan Government on 6th of Feb. there is lot of speculation and preposterous presumption going on in many circles.
USA expresses "concern" on this release. Indian National Congress asks why should Pakistan not be declared " a terrorist State" and of course many others Governments keep talking that
A Q Khan was the man who "leaked" nuclear material and know-how to Iran, Korea and Libya and they say now he is free again to do the same. That is really strange because as I understand he has been released with the understanding that he will have nothing to do with Pakistani or any other Nuclear establishments and he does not need it. Out of all countries India and Indian N. Congress seems to be concerned as if India has no responsibility in Pakistan's Nuclear development. He has Ca of prostate requiring treatment, is already over 72, he will be thinking of nuclear? Come on, you must be kidding!
I fail to understand these things myself. The only country that has ever used this technology in War is USA and all the "allied group of Nations" are responsible for it and USA has the freedom and as well as more than 5000 nuclear heads in its arsenal (what for?). Less than half of that may be in Russian hands (what for?) and over thirty in a small country of Israel (what for?). Of course these are not states that will use them or would they!!!!!! (Did you ever see the documentary of Cuban crisis during Kennedy's time?, I was horrified to see how close we were to the destruction of this world)
Mohammed ElBardei, the IAEA chief has a lot to say about these Nuclear heads. He is more knowledgeable and more practical in these affairs but his opinion is not given any weight by those who do not wish to have peace. He says that there is more danger in keeping such nuclear heads in the countries as any suicidal chap can go and create atomic explosion, he does not have to possess it. Such matterials are transported from one place to another with that calculated risk and that is more of a concern. He considers that max. of 500 N. war heads are enough to destroy this world, why should a country have more than that he fails to understand. He feels that Nuclear war heads are now a thing of the past and new bombs and Drones etc. are going to be the future weapons not Nuclear war heads
I find more sense in his statements than in the cry of various governments (including our own US) about Nuclear NPT.