OTTAWA — The federal government is distancing itself from its own lobbying and public relations campaign to polish the image of Alberta’s oilsands, following revelations that an internal strategy document labelled First Nations and environmentalists as “adversaries,” while describing the National Energy Board, an independent industry regulator, as an “ally.” The descriptions were highlighted in a March 2011 document from the government’s “pan-European oilsands advocacy strategy,” released through access to information legislation.