I think you are right -- because part of the US ability to protect Israel has been the respect

that European governments have for Obama and Kerry. That respect has enabled the Obama administration to soften many reactions against things that Israel has done.

Netanyahu might find that Trump will be more problematic as he actually supports those to Netanyahu's right - like Bennett. In addition, I do not think that Trump will be acknowledged as the leader that Obama really is among our most important allies. (I think the US media itself is influenced by the constant RW derision and through laziness, they ignore that Obama/Kerry really did pull together a historic coalition and were essential to getting nearly 200 nation's to sign on to the climate accord. )

Reading and analysis in Haartez of the UN agreement - http://www.democraticunderground.com/10141647865 - this was a defeat for Netanyahu. He points out that while the US abstained, the rest of the security council voted for this. In particular, he says of Russia,

"The allegedly close relations between Netanyahu and Putin fall short when it comes to Russian interests and UN votes. Russia is one of the main supporters of the Palestinians over the last 50 years. During those years and today as well Russia has been voting against Israel in every possible international forum. It is possible that things will change in the future, but at least at this stage a Russian veto on a UNSC resolution concerning the Israeli-Palestinian conflict belongs to the realm of science fiction and not diplomacy."
read more: http://www.haaretz.com/israel-news/.premium-1.761049

The reality is that the US has been a restraining force on countries like France - and even the UK and Germany - from publicly criticizing Israel or allowing full blown boycotts. This is out of respect for Obama and Kerry who asked for the space to try to work with Israel.

The scary thing for Israel - and the US itself - is that Trump may in a very short time eliminate the US as a respected leader.