Then you definition is flawed and meaningless since SA has already betrayed US interests by the common sense definition.We are on an online forum. Most arguments and terms are arbitrary. Do you understand betraying US interest? as in Saudis switching to RMB from US dollars when pricing crude (thus abandoning petrol dollar). This will be seen as a betrayal by US since it harms US interests.
Different nations have their own calculation of what actions best serve national interests. From EU public, they are mostly in support of the sanctions. As for EU business interests in China, we will see how strong is PRC's retaliation in the coming weeks. Let's hope it's not a repeat of the NBA boycott.
So public opinion equals national interests? If so then they are more incompetent than I thought.