It was a wrong statement by Trump, and there is no defense for it. It's one of the worst statements in politics I've ever heard.
The "whataboutism" that people complain about, however, is legitimate. Jesse Jackson has never refuted his comments about New York being "H----town" in 1984, and Democrats running for President still make their way to his Rainbow PUSH Coalition events to seek his approval, and I don't see anyone here apologizing on behalf of the Democratic Party for the fact that its candidates still make their way to an open anti-Semite. To this day, Al Sharpton refused to admit he perpetrated a hoax in the Tawana Brawley scandal by supporting false charges of rape against white police officers, and he's an integral part of the MSNBC commentariat. Not only has no apology been made by either of these folks; no apology is demanded by any of those who are now jumping on Trump.
So, yes, Trump's attack on Mrs. Dingell was hurtful, and deliberately so. It was an unambiguously crappy thing to do, and something he has no excuse for. But equally crappy behavior has not been cause for the bulk of Democrats here to not de-legitimize Al Sharpton or Jesse Jackson. (And to say "equally crappy" on the part of Sharpton is charitable; his behavior caused two (2) people to have to defend themselves against Sharpton's false charges.)
Democrats have "gone low" on Trump, but cheered on Eric Holder when he said, "When they go low, we kick them." This is what that looks like. Trump ought to dial that back, simply because it's the right thing to do. He should apologize, simply because it's the right thing to do. But that standard has not been the one Jesse Jackson and Al Sharpton (particularly Sharpton) have been held to by those so bent out of shape here. (Including Badger, but he's put me on ignore, so he'll not find out about this, and won't be able to respond to it.)
Hey Fuzzy don’t think anyone told you this but a key problem in your example is....JESSE JACKSON NEVER BECAME PRESIDENT! (Also fwi he did apologize so do sone simple research next time https://www.nytimes.com/1984/02/27/us/jackson-admits-saying-hymie-and-apologizes-at-a-synagogue.html) Do you not see the glaring issue in whatabouting something the president said with something a person who only got 21% of the primary vote 30+ years ago said when making the argument both sides are bad?
So condemn Jesse Jackson for his antisemitic comments, and his associations with Louis Farrakhan. Jackson's still a relevant power broker in the here and now in the Democratic Party, and the same can be said for Sharpton. Do it now; step up to the pump and condemn Jackson's statements.
There's a reason why you can't.
Because about the only people who care about Jackson or Farrakhan these days are Republicans desperate to use whataboutism to defend Trump?