You failed to mention that part. The East Germans worked more to keep East Germans from fleeing to the West across the wall, then West Germans did keeping them out. What you have here is an inaccurate comparison with Gaza. Populations at war DO have a buffer zone, and since Hamas declared war on Israel in 2007, and launched 10,000 rockets into civilian centers in Israel since then, the die has been cast. But I accept your last sentence, and to wit, I agree that Gazans are not a civilized society.
from the article: Israeli troops shoot Palestinian approaching Gaza fence