For that young mayan, it was the worst event in his life. For cops and the normal victims of their violence (Black Americans) it was today and everyday. He has my sympathy, but not my outrage. I reserve that for the suffering of my own people, whom I am pretty sure most of his people would not care one whit about.
So, they should do what many of my people are apt to do, protest about it. Many of my people will join in, because a lot of us take to heart the idea of "Injustice anywhere is a threat to justice everywhere" (MLK). I personally have moved passed that, noticing that a lot of other groups do not share that same sentiment. So my focus is really just better outcomes for my own people and for others coming here they receive my sympathy, but not my time and finances.