Just hope you are right... however, I wouldn't be so optimistic... the red brigades were easy in comparison to what al quaeda is... they were motivated and prepared to fight, but weren't willing to blow themselves up with their victims, and were a strictly hierarchical organization, if you got the chiefs, you dismantled the brigade. Also they were easy to infiltrate, and through infiltration they were defeated. Despite this fact, they killed many, including a prime minister (!). Islamo-fascist groups don't have these vulnerabilities...
And besides, democracies are a perfect target for any terrorist: you cannot detain anybody just because they preach hate or they are suspected to be terrorists - that is, you can arrest terrorists only if and when they are caught more or less red handed... sometimes only after they have struck. This is true in the US, even more so in Europe.
There are many targets they can pick, and you cannot guard them all. I can think of at least 3 ways to kill at least 100 people, and one way to build a dirty bomb in 12 hours (forgive me for not giving details...) the only secret is to pick targets which aren't guarded, and anywhere there are more than 20 people within a building, there is a target.
I'm afraid, it's not a matter of if, but a matter of when, be it Italy, Australia, the UK or the US.
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Never attribute to malice that which can be ascribed to sheer stupidity
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