The Jews were kicked out of Israel by the Romans in the year 70 CE. The Romans later renamed it "Palestine". However, contrary to what many people believe, not all Jews were forced out which means that there has been an uninterrupted Jewish presence in Israel for over 3000 years.
The main exile of Jews from Palestine came in 70 CE. However, there was always a minority of Jews in Palestine until 1950 when they became the majority.
The Jews rebelled against Roman rule in Palestine.
The Exile of Jews from palestine is known as the Diaspora
There is no exact year that Jews started going to Israel/Palestine when they had not been migrating before. Migration picked up immensely in 1919 because Jews finally had legal permission to migrate to Palestine, but migration has waxed and waned since that point and existed before that point.
Because Palestine keeps attacking the Jews.
It was Israel (then called the British Mandate of Palestine).
Nope. Many Jews live in Israel (what used to be called Palestine).