The linked VDH column is an excellent example of what the left will label as "Whataboutism", and therefore unworthy of consideration,
In formal debate, the definition is in Latin tu quoque, an "appeal to hypocrisy" -- and considered to be a "fallacy".
In the real world, there is very little difference between "precedent", "hypocrisy", and "Whataboutism" except that "Whataboutism" is a recently created term nearly always applied to a "conservative" pointing out that the left has done very nearly the exact same thing in the past -- as in the case of the linked VDH, the invented label that means "the power elite have declared this argument to be invalid" is applied, and all people of "good faith" (the "Woke") discard it from consideration.
I the postmodern world, "Wokeism" (which based on deconstruction) declares that all argument and facts are merely "power plays", assertions of "privilege" (often "white"), or examples of "patriarchy". Since very few "moderns" have anything but very cursory knowledge of history, debate, epistemology, etc, it is "true" that in today's world, "survey says", "experts say", "most people believe" is considered to be "truth" (the kind of "truth" that is situational, so consistency is never an issue).
Since we live in an increasingly Fascist world with the power being held by media, wealth, the state, and leftist academia, conservatives efforts to point out things like hypocrisy are meaningless to a huge number of people. They may well be meaningful to many of the 70 million Trump voters, however both their votes and their opinions have been rendered moot.
The elite have decreed it is a time to "heel", so are busily suppressing any speech that is not in agreement.
It seems to be a bit self contractatory as in:
Comparing the way this summer’s riots were dealt with and how the Capitol riot is being dealt with is not a fallacy, it’s how logic works. In every aspect of our lives, from law, to science, to medicine, to child-rearing, and relationships, we compare similar past situations when making a current choice. It is literally the most basic element of reason. We don’t completely reinvent the wheel every time we are faced with a choice or dilemma.
OK, so far so good. However ...
First of all, it is vital to understand that absolutely nobody who doesn’t require mental help, prison, or both defends the Capitol riots. So whataboutism doesn’t really apply here in terms of defending the actions, even though many on the left did defend violent elements of the summer riots, especially concerning property damage. What conservatives are objecting to is the double standard in legal, political, and media reaction.
Hmm. So does Kamala Harris, and in general all the leading Democrats who defended the summer riots, even kneeling in kente cloth scarves in support of the George Floyd riots, deserve mental help, prison or both?
What would "defending the Capitol riots" entail? Saying that when elections can't be trusted, people ought not resort to demonstrations? The fact that a demonstration turned into a "riot" is unfortunate, however does it invalidate all demonstrations as they may turn into riots as well?
The unarmed veteran Trump supporting woman shot and killed was a casualty is certainly tragic. Not many calls of "police brutality" there.
It turns out that the heavily mourned and nearly canonized officer supposedly "murdered" by "blunt force trauma", wasn't ... equally true of George Floyd.
In recent days, CNN reported that investigators have determined that initial reports about Sicknick being hit with a fire extinguisher are not true and that medical examiners "did not find signs that the officer sustained any blunt force trauma" as they "struggle to build a murder case" in the officer's death.
There was a 26% rise in the killing of police officers this past year without much coverage. The MSM naturally does not link that to the BLM violence, although it was hard to hide in the case of David Dorn, a retired black officer killed in St Louis.
Hypocrisy is as natural to humans as breathing. Matt 23:15 “Woe to you, teachers of the law and Pharisees, you hypocrites! Comparison between words and action is a requirement for virtue.
"Hypocrisy is a tribute that vice pays to virtue". If one has standards, one will at times be a hypocrite since the higher your standards, the more often you will fail to meet them. If you are a wise person, you will appreciate it when your hypocrisy is called out. (Proverbs 9:7-9)
Whoever corrects a mocker invites insults;
whoever rebukes the wicked incurs abuse.
8 Do not rebuke mockers or they will hate you;
rebuke the wise and they will love you.
9 Instruct the wise and they will be wiser still;
teach the righteous and they will add to their learning.
The Trump years were years when the left and the "Never Trumpers" regularly said "What about ..." and it was fine. Certainly, not it will generally be conservatives saying "What about ...", so because the left controls the media, we are being admonished that while it was at perfectly valid point to be called out against Trump and his supporters, it is no longer anything to be considered.
Perhaps a picture is worth more than any number of words.