Al- Qaeda and the I.R.A.

With Al-Qaeda being the most likely suspects of todays attacks in London I was wondering how people that believe that the NWO was behind the Al-Qaeda attacks in 9/11 link both these attacks with the IRA attacks on England over the past 30 years.

What did the British Government/NWO gain from ridding the I.R.A. threat and replacing it with an Al-Qaeda one?