There is a difference between stated goals, and actual goals.

it is naive to think they would publicize their actual goals.

(for instance even though Bin Laden criticized the US for the invasion of IRaq - ultimately it was a gift to OBL as it enraged the Muslim world and led to the recruitment of thousands of Jihadists. IN spending maybe $200,000 US with the 9/11 attack it resulted in two wars - and billions of US $ being spent. (Joseph STiglitz - former world bank economist - has estimated the IRaq War cost to the US economy between 1.5$-2 Trillion US dollars. Not to mention the recruitment of 1000s of angry young Muslim men to the Jihadist cause.)

OF course its likely that Osamas project just happened to collide and
energize the project of the NeoCons who were already planning to topple Iraq - install a friendly govt, and increase the oil output
thereby breaking OPECs control.

Getting back to the Canadian terror group, if such brazen attack had occured Id say it was highly unlikely that Canada would withdraw from Afghanistan. Rather it would lead to a more hardline govt. and possible backlash to the Muslim community. Anymore than 9/11 didnt lead to a more isolated and peace loving America.