I find the almost gleeful armchair experts declaring this that and the next thing to be much more obnoxious.
We saw just recently in New York an incident that seemed to mirror recent attacks in Europe that turned out to be nothing of the sort.
The fact is that around these sort of things there is a lot of misinformation. I live in Stockholm - with our recent incident there were reports of shootings all over the city that all turned out to be false. I tried to calm people in my office as they treated every single social media post as fact.
It isn't "let's wait and see", it is "let's listen to the officials rather than social media".
Both sides are beyond obnoxious. One side is damning an entire group of people, the other are pretending the problem doesn't exist.