Israel also has restrictions on citizens from Arab and Muslim countries from becoming an Israeli citizen:
During the period when the Law is in force, notwithstanding
that which was stated in any other law including section 7 of the
Citizenship Law, the Minister of the Interior shall not grant
citizenship to a resident of the region or to a citizen or
resident of a state listed in the schedule in accordance
with the Citizenship Law and he shall not grant him a license to
reside in Israel in accordance with the Entry into Israel
Law, and the region commander shall not grant a resident of the
region a permit to stay in Israel in accordance with security
legislation in the region.
”Region” – any one of these : Judea and Samaria, and the Gaza Strip;
Schedule (Sections 2, 3A1. 3C, 3H): Iran, Lebanon, Syria, Iraq
http://www.hamoked.org/files/2010/5727_eng_new.pdf
http://www.knesset.gov.il/laws/special/eng/citizenship_law.htm
Wikipedia also lists a few more countries (Yemen, Pakistan, Sudan...) but I can't find those in listed in the English translations of the law.