We can guess why Israel was excluded from the main body of UNESCO’s report of scientific achievements for the period 2005 to 2010. After 18 months of protests (and withdrawal of funds by the USA) UNESCO has now promised to add an on-line addendum to the report.
http://www.timesofisrael.com/the-curious-saga-of-unesco-a-global-science-report-and-the-omission-of-nobel-prize-winning-israel/