"How is it that a Jew can still be a Jew, if he is an atheist. He can still be a Jew if he is Buddist. But not a Jew if he is Messianic?" Your confusion can be easily cleared if you remember that Judaism is a religion - just like Islam and Christianity. You can be an Iranian Jew, an Iranian Muslim, an Iranian Christian, or an Iranian Bahaa'e - and all 4 types do exist today! You can also be an Arab Jew, an Arab Muslim, an Arab Chrisitan, or an Arab Bahaa'e - and all 4 types do exist today!
Pakistan foils planned jailbreak that would have freed Daniel Pearl's killer (Reuters)
from the article: Suspected Jewish terrorist admits to anti-missionary activities