The point is that your post, was an irrelevant ad hominem attack on the person, rather than an attempt to advance discussion of the substantive topic of the article.
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Harper's thin private sector employment record was, likewise, irrelevant.
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(On the other hand, that his employment was with Imperial Oil, though, may well not have been irrelevant in terms of the climate change obstruction policies of that government, but that was not the point I was addressing.)