Yes, it's that simple. Not only does it predate the 1967 Six Days War, it was a principle in the United Nations Partition Plan.
By Zero0000A/RES/181(II) [Public domain or CC BY-SA 3.0], via Wikimedia Commons
Illegal Jordanian Occupation
|pre 1967 Six Days War light beige|
The Jewish Israeli diplomatic fight over Jerusalem isn't fifty 50 years old; it's seventy 70 years old and even older when you take pre-state history into account.
And for all those decades the State of Israel has been using the wrong "weapons," the wrong everything. That's because it has wimped out at admitting that our enemy is the antisemitism that has existed from the very beginning of Judaism.