A state religion (also called an official religion, established church or state church) is a religious body or creed officially endorsed by the state. These are the countries that have a state religion:
(source)
Whether or not a country has a state religion can, of course, have consequences for religious freedom and religious plurality. See this post on religious freedom for more information.
Israel is a Jewish state. Too bad your map does not reflect this.
The reasons, given by the authors of this map, not to include Israel are here: http://en.wikipedia.org/wiki/State_religion#Additional_notes
I agree it’s debatable.
Yes, I saw that, but did not find them very compelling, particularly in light of the grave abuses against religious freedom that Israel commits.