The Chief got the phrase from the guy who used firehoses and dogs against children during the Birmingham, AL protests.
This sounds like the “straw man” argument. Just because I made a specific point about a specific utterance does not mean that I was claiming that literally every single thing he said was intrinsically racist. In fact, I think many Americans would be fine with the idea that this was a massive stretch of what I just said.
But you knew that and decided to post anyway.