Having been in power for so long and with arguably a strong level of domestic support for decades,
…That’s because every time someone else comes even slightly close to having any kind of popular support, they ‘commit suicide’, or commit a crime that gets them sent to prison in Siberia. E.g., Alexi Navalny. Moreover, he controls all the media in the country, and has largely managed to cut off significant access to any sources of information from outside the country. So that ‘strong level of domestic support’ is due to a dearth of options, rather than genuine support.
might we perhaps give Russia slight leniency to make minor readjustments to borders, if (hypothetically) the local regions did legitimately vote in agreement?
No. That’s like asking if Texas can choose to secede. They can not. Nor can the rest of the US vote to expel Texas without triggering a constitutional crisis. The region belongs to the country first and foremost, before it belongs to the region. Now, if an entire country votes to allow a region of their country to be annexed, then sure. Even if elections in Crimea were free and fair–and the evidence strongly suggests that most of the people voting were coerced–it would need to be all of Ukraine voting to allow the annexation.
Recall, being “ethnic Russian” is of key interest and, in my opinion,
There are a lot of “ethnic Italians”, and “ethnic Irish” living in the US, and they were badly mistreated during the first part of the 20th C. That wouldn’t have given Ireland or Italy the right to invade New York, because, despite their ethnicity, they were Americans. Not Irish citizens, not Italian citizens. And, bluntly, Putin claiming to be concerned about the treatment of ethnic Russians is concern trolling. It was an excuse to invade, just like his claims of de-Nazification. The real issue was that Ukraine had left the USSR when the USSR failed, he wants it back, and any excuse that people can be suckered into buying is good enough for him.
when exactly would we start to repair our relationship with Russia by loosening up on them a little?
Again: no. You don’t improve your relationship with a bully and a criminal by capitulating. They are the one that is acting incorrectly, so it is incumbent on them to improve their own behaviour, rather than the victim accepting a little victimizing.
I do this. Unfortunately, you have to be able to time your laundry to sunny weather. We put laundry out yesterday when it was sunny and blue skies, and it poured overnight. So now we have to do laundry again.
Works great when the weather cooperates though.