“This is a centuries old blood feud. Good luck solving that.”
Its a one sided blood feud. Russia does all the attacking of Ukraine, and Georgia before this. Before that Russia/Stalin starved to death 5 million Ukrainians, 1933-1934 during the Holodomor. The simple matter is that Ukrainians don’t like the stupid drunken parasites and want to be left alone. Similar to Poland. And Poland is quickly arming up just in case. They spend the highest percentage GDP on defense in the EU.
When was the last time in this “blood feud” that Ukraine attacked Russia?
Well that's just it. It's "blood feud" because Russia has spent centuries trying to dominate all the slavic people including Poland. The slavic countries reject the domination from foreigners. In this case it's Russia causing the problem and no one else.