The Wall Street Journal had an editorial on this earlier, but they’re selling the Ukraine situation short along with several others.
The [Russian] attack violated a 2003 treaty that designated the Azov Sea as shared territory between Russia and Ukraine.
Sadly, this accepts as fait accompli the existing invasion, partition, and occupation of Ukraine by Russia.
The attack, and that invasion, partition, and occupation, also violated, and violate, the Budapest Memorandum, which the Western signers (the US and UK) appear too timid to enforce—even though we’d be confronting a country whose economy is roughly akin to that of the Black P-Stone Nation, and whose morals are those of MS-13.