Why does IAEA act biasly to Iran and North Korea regarding the nuclear issue?

Question

Why they are so flexible when dealing the nuclear issue from America, Israel and other big-power countries? If IAEA wants to be fair and square, they should prohibit the use of nuclear source from America, Israel and the other countries. After that, all people in the world can live without the fear of nuclear war.

Answer 1

Actually the IAEA has been rather reasonable about the Iranian nuclear program,seeing how Iran keep it a secret, in violation of the NPT for--what--20 years?  And Korea is being rewarded for leaving the NPT.  

Yes Israel need to be inspected, so that once and for all it can be know: Does Israel have the bomb or not?  

But who exactly is the IAEA going to get to enforce inspections on say China, Russia, or the USA--Peru?

Answer 2

Laws do not apply to the imperialist power and their closet friends. Laws are only for the more impotent nations.

Answer 3

Maybe because both of those two countries have a long history of threatening their neighbors?