I feel like we are in uncharted territory in the US.
Aside from this being a government mandate, this is not a political Red vs. Blue. We have the government and media outright lying about an event that many people flat out know that's not true. There are families and extended families and workers all affected by this, not down political lines.
The government, private companies, and media are all lying to us about a non-political event (again, in the sense of red vs blue).
I'm not sure about "uncharted" — I'd say it's more like the repetition of a cycle. I'm old enough to remember Ari Fleischer standing at the same podium and spouting out blatant lies on a daily basis to run cover for the Cheney-Rumsfeld-Wolfowitz-Feith-Rice-Powell cabal. The usual suspects in the corporate propaganda racket fell in line and followed their marching orders, bombarding us with a relentless outpouring of support for the lies, all couched in polite and seemingly measured terms. Here we are again, except this time the war is being waged on the American people instead of some punching bags thousands of miles away.
Perhaps not coincidentally, this was during the most recent time when our civil rights and democratic institutions were under direct attack and when executive power was elevated to unlawful and never before seen levels.
For what it's worth, I believe Fleischer published some sort of memoir trying to absolve himself for his complicity in pushing the lies after the fact. Perhaps the red headed demon has some scrap of conscience, but not enough to walk away from her position of wealth and fame.