A cluster of events at a particular location by definition is not random. The use of random when discussing knock out game events is another example of liberals using New Speak to fuzz up truth.
Here, the reader is invited to make "unjustified" synonymous with "random." I am 100% certain the attack was not "random," not even if there was only one, and not a cluster of them. The attacker chose the victim with deliberation, judging size, skin color, and perceived strength.
Then you get to the legal threshold for affixing a label, like "hate crime" or "racially motivated." If the attacked refuses to attack a black skinned person, and chooses victims at least in part based on skin color, that is not enough to label the attack "racially motivated," as a matter of law. So, readers get all sorts of "no sign this was racially motivated," even when the attackers NEVER select a person of like skin color.
Word games played by idiots.