Sadly it is the truth that so long as we do not target the most likely suspects in both terror, money for terror and trafficking the arms and explosives for terror, then they will continue to carry out these acts with impunity.
What price our democracy and high moral standards? Well, our lives actually.
So as WM says. Those of us who are trained go into trained mode when we see insecure situations. We look for exits, we look to see how we can avoid being hit, we look to see who is in authority and how we might get information to them. But, above all, we preserve self. If we have to fight we strike to kill in the first instance; there are no half measures in this.
I know a lot of Germans, we dance there, I've worked there quite a bit and we are sorely missed when we can't make it to balls. These are Germans who miss us, not British ex pats. I bleed for them, but they have to learn. They can't excuse or apologise away the actions of these extremists and you simply can't invite them in, wholesale.
Witness the Calais Jungle. I went to look for it on Google today and, for the first time, I had to put in Calais, not just the jungle. The first line of the wiki page on the Calais Jungle states
The Calais Jungle was a refugee and migrant encampment in the vicinity of Calais
After all the blackmail, all the press, all the claims that the UK were somehow maltreating these illegals, the UK voted to leave the EU. Then the Tory party elected a new PM with non Nonsense, in September. The Jungle was gone in October. All those illegals were in correct housing with food, welfare, warmth and schooling for the children.
Germany needs to take a long hard look at that and understand just how badly they have been used. Because had we allowed those people to come in we would have invited in some of the worst self seeking, belligerent and intolerant of those leaving... Pakistan, Afghanistan, Iran, Iraq and, yes, some came from the wars in Syria.
The UK is neither so stupid nor so unprepared. Germany and, for that matter France, still, have a lot to learn.
We, in France, have a local dance festival in our town. It is international. In fact the Mains of Fintry pipe band who piped at the opening ceremony of the Beijing Olympics were talent scouted at our festival (we're twinned with Pitlochry and have a pipe band every year).
So, this year, at the festival, we had fully armed riot police and three man roving army teams, also fully armed. People were shocked. People were scared, people were suddenly left with the feeling that they were no longer safe in their own country.
I guess my answer was not helpful but my stance is this. You join Schengen and devolve your borders to other, less capable, countries. You pick a fight with Moslem jihadist groups in Syria and start bombing the hell out of them. Then you let in tens of thousands of them and don't either control their movements or process them.
Then you don't feel safe? Welcome to the British world.