WW3 is not shorthand for nukes. It's shorthand for multiple countries engaged in a simultaneous hot war on the basis of alliances and mutual escalation. Russia v Ukraine is not WW3. Russia v Ukraine and USA is the beginning of WW3. Russia and China and Iran v Ukraine and USA and Israel and UK and France and Germany is definitely WW3. No nukes required

If you wanna get mad at American weapons being used overseas in illegal wars, there are plenty being dropped on defenseless people, out of Israeli aircraft, every single day.

Porque no los dos?

The reason this is a big deal is because Russia is the 3rd biggest military in the world, and Ukraine would not be able to strike Russian territory with long range missiles unless the USA intervened. This creates a potential casus belli between Russia and the USA and if Russia chooses to ignore it then it sets the conditions for additional escalation of the threat against Russian national security. It's not a moral issue.

Ukraine isn’t using it, American personnel are. This is America shooting missiles directly at Russia, qualitatively changing the conflict from a proxy war to a direct war.

The weapons require command and control by NATO personnel, and guidance by NATO satellites. NATO is actively participating in an attack on Russian soil, using Ukraine as a buffer. This is a massive deal for anyone that does not want to die in nuclear hellfire. Russia has responded to this escalation by unveiling a previously not known to exist Conventional Prompt Strike (CPS) weapon, in an Intermediate Range Ballistic Missile called "Oreshnik", with Multiple Re-entry Vehicle and/or cluster warheads that can strike all of Europe, striking a weapons factory in Ukraine with this weapon yesterday. Again, this is a big deal for anyone that does not want to live in Posadas' version of the future.