(I know 'tariff' has become a dirty word these days to due the obvious abuse, but I swear I'm making this comment in good faith)
They did do sanctions, so I don't know what you're trying to argue.
> Tariffs would have only made energy even more expensive than it already was.
Not as expensive as outright sanctions, of course.
As I said - sanctions are discrete (yes or no), whereas tariffs are a continuous knob.
The increases in energy prices mostly came from voluntary attempts to find alternatives to Russian energy and from Russia constraining the supply.
There are still some qualitative differences: With sanctions, you'll know something dodgy has occurred when you find a pallet of My Little Putin dolls traveling through the port, you don't need to call up a bunch of lawyers and accountants.
That said, I readily admit that oil is a lot more disguise-able and fungible.
[1]: https://east-center.org/wp-content/uploads/2018/01/Belarus-E...