The current US doctrine has already brought the usage of nuclear weapons on the table, it is meaningless to assume the taboo hasn’t been relevant.
Yes, if Russia attacks NATO the goal should be:
1. Complete defeat of Russia.
2. Russia forced to give up Kalingrad and everything east of the Urals.
3. Complete reconstruction of Russia with the goal of full integration into the west and the EU in the end.
4. The current power brokers/oligarchs get gulaged for life.
Cool it Dick Cheney
Only happens if Russia continues on its current path for Tsar Putin. We can only hope he DOES have cancer and dies soon, whoever comes next probably has a little bit more of an option for backing off the destruction path they’re on right now.