What, exactly, is "unsubstantiated"? Do you doubt how Canadian Parliament works? Do you doubt that he's a member of the opposition? Do you doubt that all of his claims are vague to the point of meaninglessness?

It is throwing some fetid meat on the table and saying "make a meal". There is zero possibility of it leading to valid conversation. It is just another partisan post that would invariably lead to those tiring comments by people saying the trite "Sorry for Stephen Harper" nonsense.