1. What happens in Korea doesn’t affect us. It is probably in everyone’s interest to get North Korea put out of business as that will promote regional stabillity (a unified Korea as a balance to China, and no danger of war in that region). The US should follow the South Korea’s lead, as they have the most to lose or gain on the matter.
2.Islamic State is a serious threat to Israel in the short run, and the US in the long run. However opposing them means allying with the other enemies of Islamic State, including and especially Iran. If the goal is long term American and Israeli survival, and alliance of Israel, the Iranians, the Turks and the Sunni Arabs is in our interest – but the US doesn’t understand the region and the Israelis prefer to go it alone against all comers (unwise, but it does reflect their zionist background).
3. From a Jewish perspective, we have no “horse” in the race. Ukraine is just as friendly/hostile to us as the Russians. The US however needs to opposed Russian expansionism and to protect pro-western countries in Eastern Europe (which are still effectively Judenrein, though the locals seem to have realized they miss us).