The Telegraph puts things in perspective regarding the current terror scare:
Graphs comparing numbers killed over the years in UK & Europe --
"Terror is killing far fewer people in the UK now than it was in the 1980s [and 1970s]"
"Despite public concern, the terror threat in Europe is relatively low"
http://www.telegraph.co.uk/news/0/many-people-killed-terrorist-attacks-uk/
It's all very dreadful but how many people were killed on the roads yesterday? The last published records show 132 people died on London's roads alone in 2013.
That said, it doesn't make the horror of recent terrorist attacks the less worrying but knee jerk reactions like rounding up thousands of people will only cause greater division and probably create more terrorists and support for terrorism.
Arming the police? Maybe we should ask them first if they all want to be armed,not all do. After all in London there were armed officers on the scene within 2 minutes.You can't expect much better.
I do agree that foreigners who commit crimes should be deported immediately they have completed their sentences but that hasn't been possible due to European Court rulings on human rights. ( Yes I know, crazy).
It's also true that a policeman who shoots dead a suspect will be suspended from duty while an independent enquiry takes place and a ruling on that will take up to 2 years. What a waste of manpower and training but on the other hand look at the number of people shot dead by the police in the USA, some as we have seen have been totally unjustifiable ( and it also questions the sense in arming all police officers). In the case of rampaging terrorists it's pretty obvious that they have taken the right decision. Enquiry should take place in the background whilst the officer is still deployed just to double check operational procedures couldn't have been improved.Should be concluded in weeks not years.