Nobody expects Russia to march to Berlin. They will selectively annex or invade wherever suits them if they don’t face resistance. This article seems to say we should abandon Ukraine so German industry can have cheaper power from fossil fuels. Merkel also treated Russia like a normal trading partner when it was clear they were not trustworthy.
No, Germany decommissioned its nuclear plants as an act of foolishness. Ukraine should not pay the consequences. If Germany wants less war, it would be easy to stop supporting genocide in Palestine, while continuing to support Ukraine.
Germanys economy is suffering, but it has turned the corner. Likely trade with America will affect it more than Russia.