Yes Israel has received unwavering support in the UN from the US. The US sees it as a show of support for a friend. North Korea has enjoyed similar support from both the USSR and China for about as long. Tomorrow China will veto a security council resolution authorizing the distribution of a report of nuclear sanctions violations by North Korea. Is China really helping North Korea by allowing them to defy the world? No, of course not. It just makes them more isolated in the world. But just like with Israel and the US China wants to be seen as loyal to its friend.
UN Security Council condemns North Korea launch, vows action (Reuters)
from the article: With settlement resolution veto, Obama has joined Likud