Your reply indicates that you didn't actually read Mulroney's comment made at the time (I believe, in an interview with the G&M editorial board).  In fact, he was saying exactly the opposite of what you contend here.  I believe he used the phrase "he's the real deal" (or similar words) in cautioning that Trudeau was/is more than just a youthful, media savy, attractive leader - there is substance.

It is that "real deal substance" that makes Trudeau dangerous.