Infinite curve

Who said barriers cannot be stylish. According to a load of balls article[1], these beautiful barrier is put up because of terrorist attacks. I was a bit surprised by the history of the vehicle-ramming attacks.[2] Why do we need to harm others? Why are we doing it for so long?

[1] - http://danishdesignreview.com/kbhnotes/2018/11/28/a-load-of-balls
[2] - https://en.wikipedia.org/wiki/Vehicle-ramming_attack

Location: Copenhagen, Denmark.