Limiting consideration/comment to the UK, what the UK does not need, ever, is to be guided by people with profit/power (the military and the industrial complex, vainglorious politicians, USA presidents) or those foaming at the mouth with jingoism or other simple prejudice.
The people causing a lot of grief these days are those who are guided by schemers who keep themselves out of harm's way while exercising a very strong power over what basically are rather simple-minded people (simplistic analysis, simplistic solutions). The schemers are guided by narrow minded anger over their form of bullying (religious dictate) being disrupted - they actually fear its erosion as people begin to take it less seriously than they insist it should be and their "own" people start to think for themselves.
No religion is more powerful or evil than the adherents themselves allow it to be, it is just a jumble of words and ideas and "tradition" - the last is what is the problem, just like elitism, class, etc. is the UK's problem, albeit a less controversial and less lethal one. The mindset within the "nation" of believers in Islam is changing, not least because of terrorism driven by Islamic doctrine. Condemnation of these acts is less robust than what it might be because of "tradition", of which deference to religious leaders, real and would-be alike, is a huge obstacle. To face someone and tell him/her that he/she is way past acceptable limits in their "devotion" to the holy book is unthinkable to the vast majority of Muslims - "traditionally" there can be no such thing as too religiously driven, "too good a Muslim". They have been brought up within a society which impresses on them the importance of measuring up to the scrutiny of others, there is a constant presence of the need to prove that you are a "good" Muslim (i.e. that you overtly show it. At the behest of the schemers, the terrorists have extrapolated this pressure way past the accepted norm among the rest of their community.
Ayatollah Khomeini justified suicide tactics for use in the war with Iraq, something that previously was utter anathema within Islam, the schemers thought this was a great idea and have been using it ever since. I have spent years in Iran since Khomeini's time and it was quite clear that people there despise what he started with what they see as a perversion of the religion in sending thousands of boys to clear minefields by setting them off on foot.
Terrorism is a scourge but let's see it for what it is and not resort to Donaldian rhetoric or measures based on it.