There's a very precise protocol when a signatory of the NPT is suspected of breaching it: first it has to go through the IAEA which has to be able to inspect whatever site, then it gets escalated to the UN, then a decision is taken, at the UN level on the matter.

Not unilaterally by Israel calling the world's superpower for help.

Your logic is as sound as "since my neighbor makes something illegal at home, I'm gonna shoot him and then call my buddy sheriff for help". It is obviously illegal.