I was in London 12 years ago and I saw the Shul had a guard 24/7 .
When I was in Rome this summer, You could not attend services at the Shul unless you told them in advance .
My inlaws have shown me pictures of other shuls in Europe and its pretty much the same, Most shuls in Europe have guards, I saw one in Stockholm with a Jersey Barrier in front. Some you had to tell them in advance that you were going.
We are spoiled here in the US