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"and I did not post #8."

Post # 16.

"you said "And its not just limited to the Great Wall of China either." "

This is what I said:

"Mankind has had border walls for centuries, in every kind of culture, all over the world, to keep out foreign invaders of all sorts.
And its not just limited to the Great Wall of China either"

I will just use the Mid-East as an example of that, since you keep harping on about Israel's walls:

The history of walls has proven that they are a permanent and effective deterrent. Look at the great civilizations of the Middle East that invented walled fortifications, the former Babylonian Empire of Sargon I, The Former Assyrian Empire, The Hittites, Jericho the list goes on and on. Obviously these ancient former empires of the Middle East understood the value of walls.

I would suggest you have another look at Middle East history, or read your Bible.
Everyone remembers the Walls of Jericho,
After all, its been used in plenty of songs.
But more than all that, America is the only advanced first world country, that shares borsdrs with a third world country which keeps sending in over 4 million invaders every single year. We don't need someone to build a will before we build one too.
But they have, and we can learn from other walls that have been built in history, even the Israeli wall that bothers you so much.