Why would NKorea attack the US?

My Way News - NKorea threatens to attack US, SKorean warships.
SEOUL, South Korea (AP) - North Korea threatened military action Wednesday against U.S. and South Korean warships plying the waters near the Koreas’ disputed maritime border, raising the specter of a naval clash just days after the regime’s underground nuclear test.

Pyongyang, reacting angrily to Seoul’s decision to join an international program to intercept ships suspected of aiding nuclear proliferation, called the move tantamount to a declaration of war.

North Korea may have 1 nuke and the USA has 10,000+. Do you really think North Korea is that stupid? Unless N. Korea was conspiring with the USA to cause mass chaos. Impossible you say. Research government history.