Also: Khadafy. We asked him to not pursue nukes (and for whatever reason he didn't). When there was unrest in his country the European powers (first) and the US (later) struck him. They would have never done that if he had a nuke.
Now we have regime change and Libya is a paradise. /s
One of the problems with all of this is we may hate the government, but in getting rid of it we don't get anything better.
Ukraine gave up its nukes to Russia after the collapse of the USSR with a treaty-promise that Russia will never be an aggressor.
Iran has now been bombed into regime change for trying to even get to that point.
If there's one thing every 2-bit aspiring dictator now knows, it's the only way to protect yourself is to get nukes.
This wasn't a non-proliferation enforcement action, this was the nail in the coffin of all future non-proliferation efforts.