@Walter Hinteler,
We aren't talking about the Berlin wall no matter how ungrateful you might feel about that Walter and that makes that a straw man to divert from a discussion of the wall dividing Israel from Palestine. Do you honestly think the Berlin Wall was no different from that one dividing Israel from Palestine?
I don't have to break my leg to know that is something I would not like. Nor do I have to break my leg to know that if I jump off the roof, a broken leg (among other things) is highly likely. And I don't have to fall off a high ledge to appreciate the barrier that prevents me from doing so.
I don't have to live near a barrier wall to know that I wouldn't like it if its purpose is to prevent me from doing what I want to do. And I don't have to experience such a wall to understand that walls are sometimes necessary to restrain dangerous people from hurting other people.
I suppose it is possible that there are no bad or dangerous people in Germany and no measures are necessary to protect others from bad people. That might explain why you are having such a difficult time understanding the point I am making here.
Or perhaps if there is no necessity in Germany for any kind of security it would explain why you are able to see only one side of the issue when others do see a necessity for security.
If the Palestinians are going to showcase the wall as a condemnation of Israel, it is only right that the reason for the existance of the wall be showcased as well.