What is the Palestine conflict about?

Which Palestinian conflict is the question referring to?

Is it the Arab-Palestinian Conflict? -- which began in 1948, but became much more violent in the 1970s and 1980s, killing between 5,000-25,000 Palestinians depending on the estimates used.

Is it the Israeli-Palestinian Conflict? -- which began in the 1920s, but became much more widespread in 1947 with the Jewish-Arab Engagement and the Arab-Israeli War of 1948-9. Approximately 13,000 Palestinians have died in the Israeli-Palestinian Conflict.

Is it the Palestinian Civil War? -- which began in 2006, but most violence took place in 2007 with approximately 600-1000 deaths.

See the Related Questions below for the different Palestinian Conflicts.