Let's not be lulled into some wishful thinking where KGB's Putin is Israel friend.
Momentarily Putin opportunistically finds practical to be in good relationship with us, he doesn't want to antagonize Bibi's support for his own manchurian candidate (Donald) and draw Bibi nearer in order to better try and control our PM.
Putin is using Israel as a counterweight vs Iran's front.
Whenever he will find valuable to counter Israel's move in the region he has enough deterrence by releasing some vague declaration about syrian "sovereignty" or other mumbo-jumbo but where the clear message could be switching on his S400 systems.
Putin is nobody's friend and he is coming from an epoch where his organization saw only underling or enemies, the same vision as Donald by the way.