In the US we take the utilitarian perspective that the thief who took my bike has gained more happiness than I have lost without it, so maybe bike theft is a good thing[0].
In Brazil a bike is probably a fair bit more dear and may more likely be the user's only form of rapid personal transportation.
Haha not a snowflake's chance in hell. In much of the USA you can use deadly force to defend against property crime on private property. Conditions do apply, but that's beside the point (and are rarely enforced in self defense cases unless you went full retard on the crim).
And I'm not saying that as a bad thing, necessarily; if anything, it's probably worse to think in the neurotic PTSD terms of defending your bike to the death because you saved a long time for it and can't afford to replace it. Moreso when you can trivially afford to replace it and the person stealing it is probably in a much worse global situation than you.
For a lot of people, that moped is their life. Deadly force is appropriate. Horse thieves were hung right?