To the other folks replying: I looked up the protests on ddg images, and about half of the protesters in those photos were wearing masks.
https://duckduckgo.com/?q=blm+protest+2020&iar=images&iax=im...
https://duckduckgo.com/?q=blm+protest+2020&iar=images&iax=im...
On the first row of images that appear for me, when following the sourced article, they are from the years:
2015, 2016, 2015, 2016, 2017, 2020 (everyone in this picture has masks)