Sorry, it's a conditioned reaction from being a perpetual bully-target in grade school (I liked to read books I wasn't forced to.)
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Because Aztecs were awful people with an awful culture and religion, but I imagine the soft-hearted feel sorry for their destruction/subsumation by the evil Spanish. I, for one, think the world is better off without them. I sure as hell wouldn't want them moving to Canada, and trying to get religious exemptions from murder charges because of "Charter Rights".
Oh, and Canadians now have the right of self-defense, thanks to a plucky Chinese guy who prompted the "Lucky Moose" law. If a white guy had fought back at that African thug, things would have been VERY different. So yeah, I'd shake that Lucky Moose guy's hand if I was willing to go further east than the Manitoba/Ontario boundary.