Nuclear proliferation is international concern. Pakistan will not allow Afghanistan to get nukes. Similarly, China will not allow Taiwan to get nukes. The US also oppose development of new nuclear powers in general so this red line extend to many countries around the world. But many countries are already signatory to NPT as well.
Saudi Arabia has openly stated that if Iran gets nukes then all bets are off in this matter. The US is fully aware and in talks with Saudi Arabia to improve its security in profound ways to address this Saudi concern.
So it comes down to which country has what type of leverage in a particular situation to get something from the US. Not all are equally competent in foreign policy matters or have matching geopolitical concerns and such.
But this point is taking this discussion to extreme levels knowingly that nuclear proliferation is an international concern.
OP's claims were questionable and were addressed but he is trolling.