Helgoland, is you old man doing okay? I always feel sorry for the poor bastards who had to be a part of one of the most horrible regimes in history just because the were born in the wrong place.
Speaking of partisans, my friend's grandmother was one. She was 16 when germans entered her village, herded all the people into a barn, looted everything they could carry away and torched the barn with the people still inside. She survived because her sister literally shoved her out of the window and told her to run when nazis(and those were actual nazis, not the decent people german people just proclaimed one like your grandfather) barged into their house. Maria, that's her name, wandered the woods for a while before stumbling upon a similar group of refugees who were going to join the local partisans under the command of a man called Professor. She decided to join, too, and since that decision has made it her life's mission to exterminate as many germans as possible as an act of revenge for her family. Things she did included lynching german collaborators, blowing up Germany-bound trains carrying wounded troops, among other things, sneaking into villages occupied by enemy soldiers while they were sleeping and knifing them 20-30 times each and just in general gunning down everything she saw that had a swastika on it.
After the war ended, she led a perfectly well-adjusted life until passing away quietly in her sleep by her daughter's side and never mentioned feeling sorry for anything she did, except for running away and leaving her family before they all died.