I don’t get that sense from him at all, even though I think he’s simplifying the matter. He seems like a curious guy trying to make sense of all this. Do you actually get the sense he’s trolling?
There is nothing curious about him, you noticed that he is clinging on the Dallas example that "confirms" his opinion, while totally ignoring the fact that african americans are 2.5 times more likely to be killed by the police and that within the long history of police brutality in the US, brutality aimed at minorities and specifically african americans is well documented. Someone curious would have not only discovered these things by himself with a quick google query or he would have been led to it by the many posts that answered his initial post. But he did none of these things.