Before it kicks off big style in the UK with the likes of the scum that killed Lee Rigby? Rubbish! think about it, Olham, Manchester, Rochdale, Oxford, & a few other places that has yet to be named.
It's an interesting thought, there are Extremists on the one side who are prepared to carry out these acts of Terrorism, that we now know is a given.
There are those on the other side who have the skills to retaliate in kind, and are getting more and more frustrated at what they see as a lack of activity on behalf of the Authorities to take any action to prevent those acts of Terrorism. How long they will remain spectators remains to be seen.