The former Faith and Communities Minister said the Government “didn’t analyse deeply enough” the two men behind the attack, Islamist extremists Michael Adebolajo and Michael Adebowale, who ran him over with a car and then stabbed him to death.
Speaking after the London terror attack on Wednesday, she said it was now time to “look deeply” at the man who mowed down pedestrians and killed a policeman as he attempted to storm the Houses of Parliament.
Baroness Warsi told Channel 4 News: “I think after the tragic killing of Lee Rigby, we set up the Extremism Taskforce and what we tried to do was look for practical solutions as to how we show that people who are attracted by terrorism aren’t led down that path.
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Baroness Warsi said the UK now had to look at the "journey" of Wednesday's attacker
Once London starts to go back to normal as we’ve seen today, I think it’s time for us to look deeply at this man who committed this vile act
“But one of the mistakes I think we made then was that we didn’t analyse deeply enough those that had perpetrated that particular crime.
“And so I think after this particular tragic attack, once we have grieved with the families, who are grieving because they’ve lost loved ones, once London starts to go back to normal as we’ve seen today, I think it’s time for us to look deeply at this man who committed this vile act.”
The Tory peer said it was important to identify the “drivers that radicalise people” as police named Wednesday’s attacker as 52-year-old Khalid Masood.
Woolwich terror attack: The brutal murder of Lee Rigby Thu, May 23, 2013
British Army soldier, Fusilier Lee Rigby of the Royal Regiment of Fusiliers, was attacked and killed near the Royal Artillery Barracks in Woolwich, southeast London.
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Drummer Lee Rigby, of the British Army's 2nd Battalion The Royal Regiment of Fusiliers, was killed in a brutal attack by two men in Woolwich
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Baroness Warsi said those who killed Lee Rigby were not analysed "deeply enough"
She said: “We need to go back through his background, we need to analyse what his journey was and it’s important that we learn the lessons and identify clearly what are the drivers that radicalise people to commit violent acts on our soil.”
When asked if Britain could be sure that extremism was not “gaining a foothold”, she insisted Islam was compatible with British values.
Baroness Warsi said: “Islam is like a river, it takes the colour of the bed over which it flows and for British Muslims that bed is Britain.
“And I think it’s important for British Muslims to continue to make the case that Islam always has done that and always will.”