No, actually, we ALL do not know that, as that presentation of what is going on with the NDP 's positions is incorrect.
First off, the NDP started criticizing before the CPC came to power back in 2005, with Martin at the helm. They have remained consistent for well over 2 years. In the meantime, because of both the Liberals and the CPC, there are scores of young Canadians dead and diasabled.
http://www.ndp.ca/page/2061
Last week Dawn Black, tabled The Oppositions Report on Afganistan by the NDP. And in it the NDP call for the withdrawl of the counter insurgency military personal, and end that mission. In it they support the other 2 missions of aide and reconstruction. Moreover, today NATO spoke out against the actions of the ISAF in killing the amount of civilans they have, NATO is not in agreement with US policies in Afghanistan.
On staying in Afghanistan to provide diplomacy, aide and reconstruction:
On stopping the counter insurgency warfare and bring that portion of the military home:
http://www.ndp.ca/xfer/pdf/2007-06-19_Dissenting_Opinion.pdf
It is an extensive report which is full of information pertaining to all aspects of what our military is, or is not doing, in Afganistan. Plus what NATO is doing and Afghanistan and the plight of the women and children.