Okaaaay... You tell me what this is about. Really about. No - I mean really about.
The cartoonist will no doubt deny (Toby Toons will say this has nothing to do with dog-whistle race-baiting since he knows how disgusting it is and - thankfully - "not PC"). But not plausibly.
It is meant to make certain people laugh. The laughers are tuned in to the whistle.
Oh, I found it on that chaaaaarming site, redstate, a site I should never check out on an empty stomach.