No...Never Forget...Never Forgive...They could have fought together with Polish Patriots to defeat the Reds, but they decided to murder Polish women and children instead.
It is difficult but that is what Christ asks us all to do. Remember, historically Ukrainian national liberation meant liberation from Poland. You are asking people in the middle of the horror of WWII and under occupation to foresee and to strategize a union with Polish resistance. That was an impossible task for them.