Alright you have fun talking to whoever it is you've created in your head to talk to.
Seems to me that s/he's just pointing out the reasonable conclusion to what you've been saying.
I've mostly kept out of this, since it's...somewhat interesting to watch a mostly white group (yes, an assumption) try to figure out who is and isn't a racist. Mostly because, in my experience, the folks caping for the "panicked cop" can and often will slide very quickly into "Well, Philando Castile (or whoever) was a thug" when given the slightest opportunity.
And then scream when the obvious racism is pointed out to them.
And most of my black and Hispanic friends have noticed the same thing.
A lot of people work hard to not be called a racist, and not to call other white people racist, but not so much into, you know, not being racist.
As far as this goes - I actually believe that the cop that shot Castile genuinely thought he was about to be killed - even though he obviously wasn't. And I think the same about the cop that shot Levar Jones, and quite likely even the lunatic that murdered Jordan Davis. And it's entirely possible that there were dead-serious proponents of
Drapetomania, as well as the people who swear that they aren't racist, they're just tired of those lazy blacks and Mexicans who refuse to take jobs, and steal all of "their" jobs.
But all of the above are examples of racism.