First I would like to acknowledge that it is very difficult to present controversial topics in a neutral tone. Each person has his or her own take, and will tend to slant the presentation toward their own point of view; sometimes without even realizing it. This is a very natural tendency that everyone (including myself) has been guilty of. That being said, here are some different things you could include to make your presentation more neutral.
1. Consciously present gun ownership in America as a controversial issue. Remind your audience that America is a far larger country than Korea in terms of size, and that America's population is also much larger and more diverse than Korea's. This helps explain why Americans can have very different views on gun control (or any other controversial issue), depending on who you ask.
2. Some reasons a person may choose to own a gun in America include: hunting of animals for sport or sustenance, target shooting as a competition or pleasurable hobby, to protect one's self or family from criminals, among other things depending on the individual.
3. America has a volunteer military, and allowing private citizens to own guns provides a certain kind of insurance. In the case of an invasion, private citizens will not be left defenseless if America's military is absent or ineffectual.
4. America won it's freedom from a tyrannical government through a violent revolution. The framers of the Constitution wanted to be sure they did not create a system that could morph into what they had just escaped. By including "The Right to Keep and Bear Arms", many framers sought to guarantee that the government may be overthrown if it became tyrannical or irresponsive to the citizenry.
It is clear that Korea and America are very different in gun culture. This sharp contrast is a large part of why many Koreans think that American gun culture is interesting. Here are some Korean perspectives of why not to allow private citizens to keep arms (as paraphrased from some advanced speakers in my teacher class):
1. Lack of space- Korea is much smaller than America, and does not have the same physical space available for sport shooting.
2. Limited hunting opportunity and desire- Korea is a traditionally agricultural society, not a hunting society, and lacks sufficient big game species to hunt for sport or sustenance.
3. Historical context- Korean citizens have not held a right to bear arms for most of their history, partly because they have been occupied by invading powers several times who forbid it. Giving Koreans that right today could be catastrophic, as many would not know how to act appropriately with the new freedom.
In a nutshell, America and Korea are very different countries with very different historical contexts. The difference between their corresponding gun culture is therefore not any kind of judgment or definite reflection of either their people or their governments. It is a stark difference of culture; nothing less and nothing more.