Racism is not when someone points out differences between groups. In fact, differences between groups should be celebrated not treated like an insult. It's not racism when someone from a different group does, says, wears, or otherwise "appropriates" something from another group. If the person doing, saying, wearing, or what have you was racist they would think that the "others" group was inferior and NOT "appropriate" their culture. I guarantee you no Nazi was "appropriating" Jewish culture.
I remember at lunch all the tween girls were braiding each other's hair and one of them came over and asked if she could touch mine. I have VERY straight.. Very blonde.. Very silky hair. She had never seen anything like it before. Her friends all chimed in saying that she couldn't ask that. They said how rude she was. I smiled and told her "of course you can.. you'll never learn about anything new if you can't experience it.". The rest of the girls were so excited and they all wanted to take turns brushing and braiding my hair. I didn't think it weird that they were interested in learning something new. I found it weird that they had never known a white girl who's hair they could touch. I'd known plenty of people of color in my life in a small town and we all played with each other's hair.