Israel's illegal wall around Palestine maintained by U.S. commitment to terror
As seen in the above graphic from the , essentially every country recognizes the State of Palestine, except for Western Europe and some of the places it has conquered, such as North America, Australia, and New Zealand, as well as some US "partners" that "wouldn't want to ruffle Washington's feathers", including "South Pacific island nations like Kiribati and Nauru" ().
The US has for decades used terrorism to singularly prevent Palestine from becoming a full UN member state. Likewise, without the US providing the muscle and money, Israel would not be able to continue, in defiance of the world, to occupy, colonize, ethnically cleanse, and commit terrorism and massacres against Palestine.
Without US muscle backing its terror and expansionism, Israel, despite being the strongest force in the Mid East and in possession of the "world's best" air force and a large, rogue nuclear arsenal, would have no choice but to decolonize Palestine and remain within its own universally recognized borders, which are those that existed before June, 1967, when Israel illegally invaded and began colonizing and ethnically cleansing areas beyond those lines.
For approximately 40 years, the US has vetoed, generally alone (aside from Israel), every UN resolution demanding that Israel comply with this worldwide legal, democratic consensus. The vote is typically 165 countries against the US and Israel, and sometimes five or six other countries (European-conquered lands and some tiny islands such as Micronesia).
Obama has continued the reign of terror and expansion, specifically rejecting, at the UN, the demand for Israel to cease even settlement activities, let alone abandon its current illegal settlements, all war crimes. This particular resolution was brought at the 15 member Security Council, and received 100% approval aside from Obama's isolated vote of rejection, which is enforceable only due to the US dedication to terrorism and democracy-prevention.
On the 25th anniversary of the fall of the Berlin Wall, Palestinians have tried to call attention to the wall that still exists, the illegal US-backed wall that Israel is building and using as one of its means of illegally annexing Palestinian territory. Dr. Noam Chomsky, for one, has pointed out that if the wall were about security and not illegal expansionism, it could simply be made gigantic and utterly impenetrable, and be put on Israel's legal border, which countries are allowed to do.
Dr. Norman Finkelstein has suggested that Palestinians physically break down the wall en masse, as a non-violent solution, since the highest court in the world ruled that the wall is illegal and must be deconstructed, but the USA is preventing UN member states from carrying out the legally required and universally supported task.
Since the recent US/Israeli massacre against Palestine, Israel has continued its ongoing cease-fire violations, and has also announced or built thousands of new illegal settlement units in Palestine, and has illegally stolen over 4,000 more acres of Palestine (see here and here).
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Note that although the Washington Post published the above map, a chief reason that the US is able to continue to illegally back Israel, and even increase illegal support for Israel as Obama has done (indefiance of the US population), is that US media never provides the full context of the situation, as Professor Edward Said pointed out (as noted by ):
It is simply extraordinary and without precedent that Israel's history, its record - from the fact that it..is a state built on conquest, that it has invaded surrounding countries, bombed and destroyed at will, to the fact that it currently occupies Lebanese, Syrian, and Palestinian territory against international law - is simply never cited, never subjected to scrutiny in the U.S. media or in official discourse...
Given the full and accurate picture of how Israel has come into existence and what it does, already dwindling US public support for Israel (much of which, however, is based on religious fundamentalism) would certainly decrease, as public support for US atrocities generally decreases as information about them increases.