Re: Risk vs benefit
This gets to the very nub of the argument - have an upvote.
I maintain that the only response to terrorism is to say to the terrorists "Is that all you've got?" They'll have a hard time murdering all 60 million people in the UK. Or ~300 million in the US and/or EU.
You only have to fly anywhere nowadays to see that "the terrorists have won". Trying to counter-terrorism immediately concedes the agenda to the bad guys.