So this is a trope called women in refrigerators. Basically a women in the Protagonists life is killed or attacked in some way in order to give the Male lead the initiative to do something. Once you notice it you'll see it everywhere. Action movies are the worst about it.
Not really. For one thing, the husband gets clapped instead if you pick female, so it's Spouse in a Fridge, not an observation on sexism in media, for another all the plot and dialogue revolves around you finding your stolen infant and not finding vengeance for the spouse.
Yeah, it seems like such a predictable way to make the protagonist have "nothing to lose" and allow him to do something crazy without abandoning his family. It's way overdone.
Yep. I detest it. Biggest personal examples in my nerdy life I can think of: Mara Jade, and the main female leaders from the first Borne movie. Example 1 I love Mara Jade in Timothy Zahn's work and honestly have very little experience with her outside of it, while the second is just a set of movies where this stood out to me.
That still relies on building up the relationship Peter has with his uncle and showing him to be a good soul so you'd feel the death. The genius of using a puppy is that you don't have to spend almost time explaining the relationship. It's a puppy. Of course he's gonna go murder everyone now.