I don't think that we gamers who praise GTA V, are unsympathetic and that we just like the stuff. We know it's fake, I'm sure most of us detest any sort of real world violence like that. However, still we're just human, and even in a game meant to have fun, we can still feel about stuff in it even if it's fake. I'll give an example of me personally, when I was playing Splinter Cell Blacklist, there's an option of killing or sparing the people you interrogate, now that won't really affect the plot of the game, but in the end I spared most of there lives instead of killing them except for a few...assholes.
My point is that we all react differently to things, and I know how you feel about the violent aspect of GTA V however I don't believe people are to unsympathetic if they like to do violent things in a game, but even so we can still react however you want if it makes you uncomfortable. People cry to sad parts of a movie, book or play because that's how they feel, other people will find it sad, but are strong enough to not let it out good.
My point is that we all react differently to things, and I know how you feel about the violent aspect of GTA V however I don't believe people are to unsympathetic if they like to do violent things in a game, but even so we can still react however you want if it makes you uncomfortable. People cry to sad parts of a movie, book or play because that's how they feel, other people will find it sad, but are strong enough to not let it out good.