Stand your Ground Racist?

Ok so the outcry about the Trayvon Martin killing has gone a certain way I don't understand.  I have been hearing in the last few days that people outraged by the killing are protesting the stand your ground laws.  They have pressured corporate sponsors to stop funding a legislative action group that promoted these laws calling them racist.  Just because it is assumed that Zimmerman is benefiting from that defense doesn't invalidate this as a worthwhile law.  The known facts of the Martin killing don't reflect on stand your ground laws as I understand them. It seems to me this killing is polarizing the public into liberal versus conservative agendas and includes all aspects of these various political views however much on the periphery of the event it is.  Liberals will blame lax gun laws as the reason this person died.  I say its not lax gun laws, but racism pure and simple.  Its easy to fix gun laws.  Fixing hearts is next to impossible.  I have always said you can't legislate morality or outlaw hate.