Intelligence can prevent attacks, lead to arrests before they happen, stop things before they occur. Proactive defence rather than reactionary rebuilding. I'd rather the were no bombings at all.
If this involves investigating those who need investigated then do it.
Clearly this needs guidance and oversight, but so far the gield seems split between, i don't want them spying in anyone versus I don't care who you spy upon.
It is t about bomb proof shields, and the only reason I referenced dissidents, who are not a threat to the overall UK security, is because it is local, it is a threat that hasn't gone away, and it doesn't change this thread into another, omfg its the muslims thread.