Personally. I Want To Put Humpty-Dumpty Back Together Again.

However. If Ukraine is going to allow its Nazi voices to continue with this aggressive tone.

https://www.foreignbrief.com/daily-news/un-general-assembly-to-meet-on-ukraine-crisis/

Then there is a simple, undeniable, inescapable fact.

Ukraine's ongoing territorial claims. Against both the Russian Province of Crimea. Along with the Republics of Donetsk and Lugansk.

Are a clear violation of international law.

Specifically the Montevideo Convention on the Rights and Duties of States (1933). As adopted in the Charter of the United Nations.

If they are going to continue to use military force, or the threat of military force. To asset those entirely false territorial claims.

In flagrant violation of Article 2, Paragraph 4 of the Charter of the United Nations.

Then sanctions will have to follow. Up to and including Ukraine's explusion from the United Nations.

The US, UK and Canada may be prepared to tolerate the rantings and ravings of dictators. For whom; "Illegal" is a vague concept meaning; "Anything I don't agree with." 

The UN however is founded on the principle of a rules based order.

In which laws are clearly defined, written down and available to be viewed by all.