Ukraine does not have nuclear weapons so obviously no, but you don't want to play with someone who does have, the most nuclear weapons in the world, I mean how st*pid can you get... even zelensky said Ukraine has no interest in going after russian territory or attacking russian territory a while ago, now suddenly lone and behold he changes his mind, i wonder why.
You seem to be very concerned about the escalation made by Western nations, but you always forget that the only real escalation was made by Russia when it invaded.
Russia can easily deescalate the conflict anytime it wants to, not through nuclear weapons, but by withdrawing from Ukraine and making peace.
If Russia is concerned that NATO tanks will be at the gates of Moscow, it can simply withdraw from Ukraine now and there will be peace again, and nobody will bomb or invade Russia. Pretty simple and cheap solution. It doesn’t cost them money or soldiers.
As long as Russia is in Ukraine, NATO should escalate as much as it wants, because Russia always has the “cheat card” of ending the conflict whenever it has had enough, by withdrawing from Ukraine.