They hide their total absolute nihilism behind the idea of universal human rights and universal knowledge etc. 
Armed with that rhetoric they can always cherry pick what cause they want to support because they can shift their loyalty from one cause to the next by saying the moral hot potato has moved on. 
If a person is loyal to their country there is the potential to have to lay down personal motivations for the good of the country. 
As Theodore Herzl said, “The nation is beautiful, not just this or that nation, but any nation.
Because the nation consists of what is best in any individual loyalty, enthusiasm, the joy of sacrifice, and the readiness to die for an idea.”
The lefty Jews are nihilists who do not want to sacrifice for their own people and nationality so they hide behind rhetoric and, low and behold, they claim it is actually a higher morality. 
In truth they are absolute nihilists. Noam Chomsky comes to mind. Can't you see in his eyes how into himself he is?