All powerful people tend to bring about their own downfalls. An example from recent history is Maggie bringing in the Poll Tax.
With this 90 day masterpiece Blair has not only alienated his own party but was very close to creating ideal conditions for terrorism to flourish in. As such he is merely following 'Tuchman's Law' (after the American historian, Barbara Tuchman who wrote a book called 'The March of Folly' about this same phenomenon).
I haven't seen any of the questions that were asked in the polls but I imagine the question was along the lines of: "are you for terrorism or against it?" - how do you think most normal people voted? Such evidence does NOT support imprisoning terrorist suspects, without charge, for 90 days. I don't doubt that if there is another terrorist outrage, in the near future, Blair and his supporters will be saying "I told you so!" Do not believe them - they told us no such thing!!