I've just been at a conference where some high-up guy from germany was talking about the effect of sanctions... russia used to sell wood pulp to germany, german factories would produce paper products and then sell a lot of them back to russia.
Then sanctions came, no more very cheap wood pulp for the german industry, and after a year of sanctions, the russians built (i think) 4 large paper factories, so even after the sanctions end, that business is not coming back to germany.
OK, so what? Obviously we shouldn't continue trading with enemies regardless of the economic impact.