U-235 is also very difficult to be refined for weapons manufacturing. It needs to be at least 80% U-235 Isotope to be weapons grade, and is still not the best form of radioactive element for a nuclear bomb.
Guys, let's help Iran build a real nuclear bomb to nuke Israel with.
So a guy has a gun. Another guy with a gun is watching him and decides he has bad intentions. So he shoots at him and hits a bystander. The guy with bad intentions is charged with that Killing.
What if a third guy was watching the second guy and decided he had bad intentions so he shot at the second guy and hit a bystander?