Whataboutism is not a good argument for anything ever

I am posting this after seeing a social media post from a group called Tesla Owners of Silicon Valley. To summarize, this post basically says "what about all those other car companies and the Nazi shit they did 80 years ago?"

Any so-called argument, on any topic, that starts with "what about" is a weak argument at best. Pointing to someone who did something worse than you (or whoever or whatever you are defending) does not absolve you of your guilt (or the guilt of the party you are defending).

Other car companies supporting Nazis does not change what Elon Musk did

Imagine if Johnnie Cochran said during the OJ Simpson trial "Ladies and gentlemen of the jury, my client killed two people. But what about Andrei Chikatilo? He killed fifty two people." OJ Simpson would've been convicted in about 5 minutes, because the fact that Chikatilo killed 52 people does not absolve OJ Simpson of killing 2

Another example: I weight 260lbs and have Type II Diabetes and high blood pressure. Imagine if I said "So what? I saw a guy at Walmart who weighed 400lbs." The fact that the guy at Walmart weighed 400lbs does not change the fact that I need to lose weight and get a handle on my health.

I could go on, but I am sure you get the point by now. Whataboutism is ALWAYS a weak argument because what someone else did does not change what the party you are defending is guilty of