So far the majority of the witnesses did well for the defense, including the prosecution witnesses. The prosecution is failing because they didn't have a case to start with. It was all racially and politically pushed to charge Zimmerman.
Without racism the Proglodytes are powerless.
Their only claim in life is to protect people from the evil depredations of the racist, sexist, theocratic GOP.
If we aren't motivated by race, sex or a desire to impose a theocracy then they have to manufacture the threat to keep their sheep rattled in the sheep pens.