There's so much wrong with these paragraphs, but let's just focus on this:
> If Spider-Man is constantly ashamed of unintentionally setting in motion the chain of events that killed his uncle, imagine how Tony Stark, a man whose day job included manufacturing land mines, would feel.
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Considering they are two different personalities, I imagine he would feel just fine. As the movie showed, Stark realized his inventions were responsible for hardships in the world, and he decided to do something to fix things (becomes Iron Man). He doesn't have mopey about it.
Plus, designing weapons doesn't automatically make you the moral equivalent of Dr. Mengele, since those guns and bullets can be used to protect lives as much as take them.
