When I first saw it, i thought it was a weird make-up for a bombe..as these guys like to use more technical stuff but its less easy to track nails and propane tanks so whatever...
I agree.
Wouldn't surprise me if it's some IRA fraction.
Or some loose cannon, with a random agenda: could be anti-government, could be pro-Al Qaida, could be pro-conspiracy theorism...
I doubt it's actually Al Qaida or any related organisation. What sense would that make? Whenever Al-Qaida makes big attacks on civilians, they lose support in the Muslim and potential Muslim community.
The only times Al-Qaida could hope to win support, would be if they attacked military targets. But they seemingly don't have the skills for that.
-Hedge