Further, sanctioning all of Russia would probably break the Principle of Proportionality[1].

[1] https://opil.ouplaw.com/view/10.1093/law:epil/9780199231690/...

I'd disagree with that. Russia seizing foreign territory is an extremely concerning act. The goal could well be to cripple Russia and ideally promote regime change such that she becomes an ally of America; this works towards that.

1954, when USSR voluntarily transferred Crimea to its then-vassal state Ukraine, was 65 years ago, not 1,000.

Crimea and Kuban were removed from Ukraine after soviet occupation, then "gifted" back in exchange for other territories of Ukraine of same size. However, Ukrainians, Tatars, and Greeks were exterminated first, to free space for Russian colonists.

1783 was also not 1,000 years ago.

You are making same mistake as many others. Russian Federation != Russia. If something was owned by Russia, then it doesn't mean that it should be owned by Russian Federation automatically.

Russian Federation tries to pretend like they are the only right owners of everything, viewing others nations as traitors, who need to be executed for their act of stealing from Mother Russia.

In reality, Russian Empire (AKA Jail of Nations) was disbanded. Each nation had right to create their own country. Actual Russia renamed itself into Ukraine. Russian Federation has same rights on territory of Russian Empire as other nations, but RF uses lies and fakes to pretend like it has more rights than others, then start wars and captures or tries to capture territories, which they newer owned in first place.

here is a quick visual: https://mediad.publicbroadcasting.net/p/kgou/files/styles/x_...

Catherine the Great celebrates the victory over Turks in Crimea in 1772.

here is the text: https://en.wikipedia.org/wiki/Annexation_of_Crimea_by_the_Ru...

Russian empire took Crimea from Ottoman empire in late 1700's.

Russian Federation != Russia and doesn't contain a region called "Russia". Actual Russia renamed itself into Ukraine.