Lyric discussion by fizzypopism 

Cover art for Montreal lyrics by Tragically Hip, The

I agree with tweedwoldscream, this definitely is about the 1989 Montreal Massacre.

But notice how he describes what the girl likes. She likes really simple, sweet, innocent things. She's only been with the "only boy she ever loved", and she doesn't dress too over the top (pantsuits). She didn't like any of the things that negative stereotypes of women would imply (leopard coats, or being with rich men, or faux-pas lesbianism). These are the sort of negative stereotypes that the sexist killer of the massacre would assume of women (they want rich men, they're all dykes, etc.).

This girl is nothing like how the 'coward' perceives her. Yet he's too blinded to recognize it. Hence "give me a chance to explain". Maybe if he had to really get to know her as a human being, without his sexist point of view, he would've found a good person he might've been friends with. But he never gave her that chance to 'explain' herself.

But I could be totally wrong.