This guy went through the Navy Seal in the United States, later served in the UDT, a special Korean unit, and was in Somalia from 2009 to 2010 and dispatched to Iraq from 2016 to 2017. I want to applaud the courage of this man who is making a lot of issues in Korea now. I hope he comes back alive.
But there are many issues in South Korea because of this guy. Currently, the Korean government has designated Ukraine as a travel ban country. This man did not officially participate in the Ukrainian war on behalf of the Korean military, but made his own decision without obtaining permission from the government and went to Ukraine. If this person is taken hostage, the Korean government is responsible for saving this person. So some Koreans are accusing this man of being irresponsible.
Not long ago, Ukraine officially requested support for South Korea's military weapons through the Ukrainian Embassy in South Korea. However, the Korean government could not meet this request. There are many reasons for this, and Korea has currently provided $10 million in relief supplies to Ukraine and will provide additional support. It also imposed economic sanctions, including a ban on exports of strategic materials and semiconductors to Russia.
Another reason is that if South Korea provides Ukraine with Military weapons, diplomatic relations between South Korea and Russia could worsen. The Korean Peninsula is geographically very close to Russia, so I don't know if you know it, but North Korea borders China and Russia. This means that if the Korean Peninsula is later unified, it cannot be free from the influence of China and Russia.