I had heard "cracker" b4, but didn't really know what it meant until a couple of days ago. I suspected it might be racist, or at least a pejorative. Now that I understand what it means, I definitely think it is solidly racist as it is ascribing tyrannical slave lord behavior over defenseless black slaves. In fact, I honestly don't understand how any reasonable person could conclude otherwise? I am also to understand this is the language that many blacks, perhaps a majority, use among themselves in their own community.
For many years I had heard some who felt the next war the US was involved in would be a race war between blacks and whites. I out of hand dismissed that since the blacks I knew seemed to be respectful and very reasonable people. However, I didn't/don't live in their community and hear how they talk to each other about white people. I can only speak for myself, but I know of no white people who use racist terms toward blacks and I wouldn't have anything to do with them if they did.
With the "definition of racism" being changed by the administration as something whites do toward blacks, and therefore there is no such thing as black racism toward whites, it is clear that they are giving blacks a pass for such "cracker" etc language. If left unchecked, I can see many whites - especially those who live in/near predominantly black neighborhoods - naturally fearful of blacks in general. And if some blacks feel empowered to mistreat whites openly, this could become ugly in time.
I honestly felt that true racism was very much on the decline and the numerous and frequent charges of endless racism by liberals and progressives was without merit (still do). However, if the left really is whipping up racist frenzy in the black communities (the hip-hop and rap cultures certainly are...), this has a very bad future.
Given the above, I'm expecting Zimmerman will be acquitted of 2DM, and if that happens - race riots in many major cities. Hopefully not, of course.