you've got it completely wrong. It's not about liberalism, it's about sovereignty. Lieberman believes in the national interest of sovereignty and when european nations interfere in Israels interests and Lieberman believes they are working against israel, he will speak up and put them in their place. Israeli politics has been dictated by outside sources more then anything. Lieberman is trying to break free from the hold of outside countries on Israeli policy. Imagine if israel or any other country told the U.S or european union what to do? The term "chutzpa" is more relevant to this discussion. This is a nonsense.
from the article: Loyalty oath is not about Arabs, it’s about hatred of liberal values