>>14 You forget the fact that North Korea has alienated most of its allies with recent events. China has denounced their actions, and china is historically their main supporter.
>>11 Points out that they can reach us, and probably ruin our economy, but they lack the kind of range and number of missiles to actually wipe us out, while I suspect that US nukes are capable of completely blanketing north Korea. Also, supposedly the ICBM defenses are a bit of a game of chance, and have a low success rate, or so I've read somewhere.
>>19 makes the most profound point of all though. People are actually very similar and accepting of one another. Stereotypes arise because leaders want us to take action, so they make the other side look like "bad guys." In fact, I've also read somewhere that North Korea has a lot of anti-sedition stuff going on, and that they put people who disagree with the government into camps of some sort, so I suspect that many of them just play along out of fear.
It really looks like their government just wants to look tough, so they are trying to push the envelope dangerously to do it. It's like riding a Harley or other noisy motorcycle to compensate for the fact that you have a small, mistreated populace and are not getting much play on the global scale.