Since Ukraine stated it would not host NATO missiles all along your lie is noted and dismissed.Since the Ukraine is in violation of its 1992 treaties to NOT join any alliances hostile to Russia, then "pouring the supplies into Ukraine" is an act of war that is going to get Americans killed.
Russia has no choice.
Kyiv murdered over 14k ethnic Russians since 2014, stole over $20 billion worth of Russian oil and gas, and tried to put NATO nukes on Russia's border.
That is similar to the Cuba Missile Crisis, and we all know how that turned out.
The US removed the offending missiles from Turkey.
Putting offensive missiles on the border of a country is an act of war.