So you're claiming that a bad patch on a 15-year-old boy is proof of the country's Nazism? Then what about this:
How do we label you after the open statements from your politicians and TV propagandists that Ukrainians shouldn't exist, that we should undergo filtration and be destroyed, along with your actual actions of destroying cities and settlements with peaceful residents, subjecting prisoners of war to torture and execution, and many other dirty deeds that you can't hide or spin in this era of open information!
it's a military tradition to take the insignia off a fallen enemy. A trophy of sorts.
I think you will not argue that such chevrons are much more common in the Ukrainian military.