Too many of these attacks, they seem to happen on an almost annual basis, surely it is time authorities put up concrete bollards in areas where markets are taking place with not enough gaps to fit a car through or hold them in sports stadiums/arenas etc where a car could not make a difference
tbh I don't see these types of measurements as likely in the near future. I live in Germany, have lived here for years. The Christmas market in my town takes place right in the historic centre, around the oldest church, where the rest of the year the normal Farmer's Market takes place. Any bollards there to prevent terrorist attacks would also prevent the farmers driving their trailers with their market stalls onto the square, twice a week. Not going to happen. My town will not be a huge exception. I see more concrete bollards in various places than I used to, but they're also partially used for totally unrelated purposes.
As for sports stadiums, arenas etc - this just doesn't fit with the traditional ambience of a German Christmas market, especially since it's a country without shopping malls all over the place and large urban sprawl, the way you have in parts of North America. People still walk to the Christmas market, there are still people who live in the centres of these towns, possibly right next to the market, I used to myself.
I wandered through a large Christmas Market today and didn't feel threatened in anyway, nor did I notice anybody talking about the attack in Magdeburg, tho it might not have been in the news yet. But I can guarantee that max 1% of visitors to our local Farmer's Market will be worried about lack of bollards tomorrow morning. Among the Germans I mix with, this isn't something we feel threatened by, in fact I'm more likely to die in a normal traffic accident as a cyclist or pedestrian. We think there is a lot more crazy going on in the US (quite a few different examples available) without a significant change appearing to be desired, though we'd think changes should be instigated ASAP. So, different culture, different ideas and different perceived risks.
MOO - I can't speak for everybody in Germany, but I can certainly speak for some.