You are completely wrong. First I am from EU and then I am not left wing.
North Korea secures itself from any american intervention. Iraq and Libya gave up their nuclear program and both ended up destroyed by the USA.
Nuclear weapons are from deterrence. The USA won't dare to invade North Korea if North Korea can retaliate strongly. The US bully is made powerless by NK self defense weapons.
EU (Europe Union?) ok. Because your nickname having RIo seemed very USA and your position on USA being like the imperialistic overlords is what our left wing does.
And what have secured NK from previous invasions that weren't nuclear weapons? Venezuela or Cuba? Brazil?
You don't need nuclear weapon to avoid being invaded as long as you aren't a dictatorship throwing tantrums.
Several countries without nuclear weapons weren't invaded by USA.
So US is the one bullying NK? ok.
The US is bullying a lot of country. Libya, Iraq, Afghanistan, Yugoslavia, Panama, Vietnam, Haiti, Somalia, and now Syria too where it is fighting the ISIS but also trying to attack syrian governement.You also missed Trump threatening Venezuela?
History show that no nuclear country has ever been invaded. History shows that country labelled " axis of evil" by the USA tend to be attacked and destroyed by the US.
The maths are simple, develop nuclear weapons to protect yourself against the USA, or become the possible next victim of US export of "democracy".
PS: in case you did not know Lucario is a the name of a popular pokemon