Hrmm, not sure I got the QUOTE thing correct but anyways about your question. If banning oil exports to the USA would be beneficial to Canada, and the rest of the world in the long run...I would say do it. I'm also not sure where you got this idea the NDP would ban oil exports to the USA, I haven't heard this, but very possible I missed it. I also don't see anything wrong with diversifying where our oil goes...and if that includes a slowing of how much oil we send to the USA to somewhere else because another market is proven more accessible or stable or for whatever reason.
Everybody makes points somehow: cutting welfare, education, healthcare expenditures, opposing SSM are also examples of how parties make points.