The resolution that passed the UN is not just about those disputed territories.   I don't know if Obama and Kerry actually read the text of that resolution.  I suspect they didn't.  if they did, they would know that this resolution makes the western wall illegal occupied territory, and even places that was originally part of Israel prior to the 6 day war are now regarded as illegal.

I've been wondering what would cause the US to seriously consider stopping funding of the entire UN structure.  They are now paying for 22% of the UN budget, and they need to conserve cash to afford their infrastructure spendings and moderinising their defence.

I suspect if Trump asked for a referendum with americans whether they should reduce their payments to the UN by and only pay for <5% of the total budget instead of 22, he will get a resounding yes.   5% is roughly comparable to the proportion of US population as a fraction of the total world population.   China could be paying for 22%.