It’s like Americans celebrating the people who founded that country, even the slaveowners. They’re not celebrating that part of the life of the founders, and it certainly colors the perception of people like Thomas Jefferson, speaking noble ideals about freedom while owning and sometimes raping his slaves.
These are people who fought for Ukrainian independence. That’s something to celebrate, even if it’s tainted by who they fought for and with, and at times, what their personal beliefs were surrounding issues like race and religion.
This is a complicated historical topic to Ukrainians. It’s not them celebrating Nazi collaboration.