Incident in Yellowstone National Park

Incident occurred in 2017. 

I was camping in Yellowstone National Park with my husband. It was the middle of the day and I walked on a path between two campsites to get to the campground bathroom. A white man with Washington State plates was sitting at a nearby campsite yelled at me, saying "you know there is a certain etiquette around here..." implying that I had walked to close to his campsite. I said nothing and continued walking. He then screamed, "go back to where you came from!" He and his wife then glared at me with contempt while I walked away.