I don't get the purpose of whataboutisms when they only serve to show that the user is confirming that what they're trying to defend is at least just as bad as the would-be deflection .
"You say killing hens is bad, but what about killing roosters, how about that, huh, huh?"
"Why, yes, killing roosters is just as bad as killing hens."
Not exactly a whopping doozie of a checkmate.