I support US government's move in this case! Let's not see it as an arrest of a crypto programmer to teach crypto technicalities! We also need to see where he had bestowed his crypto knowledge! North Korea is a dangerous country and with power in their hand, they can become a big threat to the world! So US government has taken the right step! The dictator of North korea is a psychopath and he can ruin the entire world! Helping such a terrorist, is definitely not a good deed!
it's a bit more complicated than "north korea bad, USA good". tabling the discussion of nuclear arms,
the sanctions are having brutal effects on ordinary north koreans---shortage of food and vital medicine, for one. so sanctions evasion should also be viewed through a humanitarian lens.
The ban on employing North Korean workers in the construction sectors of Russia, China, and other countries deprived tens of thousands of North Korean workers of potential earnings, hurting workers and their families. Sanctions have hampered the activities of humanitarian agencies and foundations (U.S.-based humanitarian agencies have faced additional difficulties following the United States’ ban on travel to North Korea). As a result, large areas of the country face increased food insecurity and a shortage of vital medicines. The ban on imports of a number of goods (including oil and petroleum products in excess of volumes allowed by UNSC Resolutions, as well as luxury goods and foodstuffs) has fueled a growth in smuggling and “gray” import volumes as well as foreign-flagged vessel operations. In general, the number of intermediaries in supply chains has increased, meaning more suppliers along the way are charging an excess fare for “risks” undertaken, thus making the final cost of goods unaffordable for ordinary North Koreans.