I watched most of the One Love Manchester concert last night. One thing that really struck me was the way just about everyone on stage was emphasising the importance of love for your fellow human beings. Not fear, or retaliation, or kneejerk political reactions, but love. This little bit from Katy Perry struck me
(It's 30s into
this video for anyone interested).
That of course doesn't mean to say we shouldn't be doing whatever we reasonably can to try to stop awful events like those of Manchester and London happening again. Of course we should. And that requires rational decision-making on the basis of what is most likely to work (while being consistent with the moral and ethical values that I'm sure most of us hold). Remember too that it's perfectly possible to make rational, well thought out, decisions, with the fundamental motivation still being love for all humanity, rather than coming from fear of some groups of people.
Reading this thread, it seems to me that some people perhaps should ask themselves whether perhaps they are making the mistake of responding with fear and kneejerk reactions, rather than thinking rationally.