Why does the savage instigate a riot?

The way that he incites the riot is by disrupting the
distribution of soma to the deltas at the hospital.  They are all looking forward to
their dose and are outraged when he starts to throw it
away

The reason why he does it is that he does not think
that people should drug themselves to the point where they have no feelings.  John is
upset because his mother has just died and no one is acting as if it matters.  He feels
that it is terrible to live a life where you don't even care about someone
dying.