Ah. I think since human death is represented far more often than animal death it's made more people desensitized to violence towards humans.
Yeah, definitely. We see so many adults (usually men) being killed in so many ways in our media that making us care about the death of another adult human is really quite difficult. There's also the reason posted by the other guy that dogs, in Western societies where they've been domesticated for hundreds of years, are both seen as companions and more 'child-like' than regular adults.
Either way, the crux of the matter is that dog deaths are a
much easier way to garner strong emotions from the audience than adult human deaths.
There is definitely a racial aspect to dog worship.
Even if there is (I highly doubt that dog worship is an exclusively 'white' thing), that has no bearing on this current conversation unless you wanted to use that notion to discredit the OP's feelings towards the matter.
Animal worship, however, has no racial boundaries and that's not up for debate. Off the top of my head some majority non-white cultures who worshipped/worship animals include Ancient Egyptians who worshipped the Cat and modern practitioners of Hinduism who worship the Cow; there's likely more that I can't think of right now but I think that'll do.
Modern dog worship is just another in a long, long,
long line of things that are mostly 'illogical' but happen anyway due to the human race's ability to place value in things other than simple everyday survival.