I took 2017 'off' from ASL (I still played 11 games, all of them teaching newer players), mainly to learn and play some other war games that I was interested in. I'm glad I did, I came back with a greater appreciation for ASL and added some other games to my weekly repertoire.
My perspective is different and cares nothing about the ideology. They are just a soldier's war souvenirs. If the man's daughter wants to keep them as mementos of her father's service and experiences, fine put them away as keepsakes of his service. If not, then I would recommend she destroy them.