So what does the 18 billion get us.
1) Over 2 thirds of Afghans in Kandahar province want us gone.
2) Whether it be by Al Qaeda (see there warnings related to the Afghan mission) or by homegrown terrorists (see the Toronto 18), Canada is more likely to be attacked.
3) The misssion poises a threat to national unity. Indeed, a terrorist attack, inspired by Canada 's presence in Afghanistan, might revitalize the Quebec’s separatist movement, especially if Quebec is the victim. Currently the Afghan mission is opposed by 70% of Quebecers. If Quebecers die as a result of us being there, the separatists will use it as a reason why Quebecers need their own country with its own foreign policy.
4) An attack would set back race relations in Canada and hamper our ability to sustain the high levels of immigration needed to combat an aging population.