“How did the occupied Palestinian territories become occupied? In 1967 Israel launched what it said was a pre-emptive defensive war against Jordan, Egypt and Syria, as they appeared to be preparing to invaded.”

The problem with these summaries is everyone can always somewhat legitimately claim a prior offence. The 1967 offense resulted from the shitshow that was the 1948 war [1], which itself resulted from a history of French, British and Ottoman control.

[1] https://en.wikipedia.org/wiki/1948_Palestine_war