Actually jamal you could argue that the wall in israel does work, in fact suicide attacks after the wall went underconstruction have dropped significantly, if you go by what israel says it can range from 90-95%, other sources show its in the 80% range, for the berlin wall your confusing its sole purpose, to prevent east german’s crossing the border to west germany. This wall that is being built isn’t going to stop movement at all, what it is going to do is force certain areas to be the only way in or out, for example most neighborhoods don’t have walls as such people can move in freely in and out 360 degrees around that community, that is hard to monitor and requires a lot of man power to enforce, by building a wall your forcing people to head to the only openings by doing so you can control who enters and leaves, this means that less manpower is needed to do the same job, while at the same time it forces the people that wish to do harm(insurgents/terriosts) to those areas, which means its easier to force the insurgents/terriosts to fight on the terms of americans and iraqi security forces. By doing it this way its much harder for the insurgetns/terriosts to get into the heart or even just the city if not impossible undetected and be able to carry out attacks or set up roadside bombs. If they manage to do breakthrough it gives pretty much the location away of the insurgents/terriosts making it an early warning system for security forces and americans. Downsides is that the people that are in the area of the circle “might” have less contact with the community outside of it, the checkpoints are also big targets if they caues lines of traffic.
Basically in the end walls force violence to only certain areas, and because its only at certain areas you are already ready or expecting an attack and as such any attacks carried out would be less deadly, which makes it much easier to deal with rather then having to deal with 360 degree threat. Because it is easier to deal with the chances of the violence ending or reducing also dies down because they can no longer be able to get the same type of success or access to their targets which will cause them to move onto easier targets.
If you don’t believe me that walls don’t add security just look at any home or building, can someone just walk into your house from any side? nope, why? because there are walls blocking that intruder, what about doors? If they are locked they also become like a wall and if they are unlocked they act a like a checkpoint they force people to those areas of the house and as such you only have to guard that door, the only wall that doesn’t provide as much security would be a windows much easier to breakthrough but also will cause a lot of noise alerting you to the presence of an intruder. Literally when you think about it, almost 90% of the security your home or apartment offers you is because of the walls that surrond you preventing people easy access.
