If you want to know what some sections of the Left believe, here's a lengthy piece on Indymedia, the self-styled
interactive platform for reports from the struggles for a world based on freedom, cooperation, justice and solidarity, and against environmental degradation, neoliberal exploitation, racism and patriarchy:

And these are the facts: Tony Blair played a direct executive role in the false flag terror attacks on London, killing over sixty innocent civilians and maiming hundreds, possibly thousands, more. He worked in close cooperation with his namesake and fellow occultist, Sir Ian Blair, and with the head of MI5, Eliza Manningham-Buller. Jack Straw, the Foreign Secretary, was also kept informed of events leading up to the atrocities.

...When Tony Blair told the press that the bombings bore all the hallmarks of al Qaeda, he broke with tradition and actually told the truth. The fall-guy al Qaeda network is the bastard child of the British intelligence services and the Freemasonic terror school, the occultic Muslim Brotherhood. MI5, MI6 and al Qaeda are virtually indistinguishable. Yes, Mr Blair, the bombings bore all the hallmarks of MI5 - and you know it, precisely because it was you who authorised the attacks.

...Tony Blair has one other ambition that remains unfulfilled. He has stated that he wishes to become the first ever president of a European superstate, a project recently derailed by the stunning French and Dutch rejection of the proposed European constitution. He also wishes, in his capacity as the new Prince of Europe, to remodel the European entity as a UK-US-Israeli forward base for imperial expansion in the Middle East and Central Asia; and he wishes to stamp this initiative with the imprimatur of the British Crown, forcing the United States to play the junior role in a new world order shaped by international bankers in the City of London.

And a selection of comments:

The very fact the Netanyahu and Juliani in London, and Wolfowitz at Gleneagles, were present in the UK at the time, speaks reams and should be ringing alarm bells for everyone.

I agree with James that this is orchestrated and implemented from within the ranks of Freemasonry, and that much of it is financed and organised from within the Square Mile of the City of London, but what we should not lose sight of is that these are, in motive and means if not composition, essentially Zionist entities, as is the Bush administration and the British establishment.

Went through BBC's news 24 live footage of thursday morning - last night. Fascinating stuff I recommend it. News 24 switches over to BBC1 for a news flash at almost exactly the same time as the bus explosion happens. While they are doing this the main screen image is CCTV (provided to the Beeb courtesy of the Met) of Euston road at Kings cross pointing towards Euston. This footage is already on a loop. Had the No 30 bus exploded 5-10 mins earlier or been delayed further by traffic... It would have exploded live on TV News 24 right outside Kings Cross station. (The No 30 bus route is down Euston Road past Kings Cross and it was heading into london) In fact I'm certain that the bus which was targeted remains in the looped footage for some time after it was diverted down Woburn Place and blew up.

It's to maintain the freedoms of these lunatics to post such offensive drivel for which we are now fighting. A sobering thought.