"...That's probably a bullshit number..."
Then it's a bullshit number.
Whatever the TRUE number is, it's still high; consequently, the message still stands.
Consider it a place-holder until something better comes along.
"...but don't let that stop your racist rants..."
I see nothing 'racist' about calling-out the country's premier Race-Baiting Race-Card-Players, the Right Reverends Jesse Jackson Sr and Al Sharpton.
Given that you do, I will take your accusations of both (a) racism and (b) ranting with several grains of salt.
It is unpleasant, to endure charges of racism, when one is merely discussing a race-related state-of-affairs, to the disadvantage of the minority-in-question, but it is oftentimes worthwhile, as, indeed, it is, in this instance...
"...Most people are murdered by people they know..."
Shall we also concede that a disproportionate number and percentage of homocides are committed by Black Americans and that Black America has a much higher incident-rate per capita
within their population segment?
"...The outrage in the Zimmerman case was that Zimmerman killed an unarmed kid, lied about it, and was given a pass by the police for two months."
No, the outrage was in our premier Race Baiters whipping the situation into a frenzy in order to make themselves relevant again.
Their actions during the early going, and as this drama unfolded and drew to a close, are the things that triggered the racial divide on this particular incident.