I know what you mean. It's completely normal though, it's uncomfortable to think that someone would kill a boy like this. It's easier and more comfortable to think he deserved to die, they'll go out of their way to find the reasons. Human nature.
Either that or people can see this case isn't really how it's being currently portrayed by the media.
Yeah, it's inconceivable that a troubled teenager assaulted someone and got shot as a result. BTW Trayvon was 6" taller than Zimmerman. Using the term boy is very misleading.