Understand that the rest of the world doesn't like us very much. And likes Israel even less.
Moreover, while it might be short-sighted, their view is modified by essentially having "no skin in the game". It is Israel and the U.S. that Iran threatens with their soon-to-be-realized nuclear ability. The mullahs are not leading cheers shouting "Death to France".
Instead, the other parties to the deal can look forward to handsome profits stemming from legitimatized trade with the Iranian regime. They aren't exposed to any obvious risk (aside from radioactive fallout).
“Instead, the other parties to the deal can look forward to ...”
millions of Muslim refugees coming into their countries.