Russia is advancing its interests with both the Israeli's and Iran - one to undermine US power, and the other to have access to israeli weaponry and high-tech economy in the future. If the U.S completely changes its foreign policy and supports the arabs instead of Israel, Russia will be lined up ready to be Israels strongest ally. Lieberman is strengthening ties to contemplate what the next few decades holds for Israel.
Shaffir to Herzog: Opposition failed to show leadership in political battles against PM (Haaretz)
from the article: Putin lauds expat Lieberman's 'brilliant political career' in Israel