Need to get rid of WWII artifacts

Hey guys

Recently I was going through some old things and found a box that belonged to my great grandfather. The box contained things my grandfather collected while being a soldier including newspaper clippings, postcards, and medallions which were really cool to look through. However, the box also contained SEVERAL nazi armbands which he most likely took from dead soldiers.

I don’t want these in my house and I don’t want to throw them away in case it gets into the wrong hands. Am I able to donate these to a museum? If not i’m probably going to burn them.