Suggest you have a read of this to understand the great historical "friendship " between Ukranian nationalists and Poles.
These things are never ever forgotten or forgiven there as per Yugoslav war of 1991-4.
https://www.thefirstnews.com/article/over-100000-slaughtered-with-axes-pitchforks-scythes-and-knives-the-wolyn-massacre-started-76-years-ago-today-and-lasted-for-two-years-6714
