Breitbart is about as non-neutral of a "news" source as you can get, and quoting them only decreases your credibility. It's hardly a surprise that an alt-right, anti-semitic "news" site would want to associate a liberal Canadian Prime Minister with the far left, accurately or not. It's among many sites (on both the left and right) that are known to play loose with facts and, if not outright mis-state things, at least take things out of context to make them seem to support their viewpoints more than they really do.
Not saying that it's necessarily inaccurate in this case, but I'm not trusting that is an accurate representation of Trudeau until I read it on a reputable, well-established journalistic site. The Internet makes it very easy to publish articles, but also very easy to misrepresent the facts to try to move someone to a certain viewpoint, and thus it's important to consider the journalistic integrity of a site.
Edit: Seems it was largely accurate in this case, but here's a link to an article from a more reputable organization (Canada's largest weekday newspaper):
http://www.theglobeandmail.com/news...ary-revolutionary-and-orator/article33057429/