I agree that the young woman allowed the emotions of the event to get to her. However, the provocation should not go unpunished either.
My son has a habit of provoking his younger sister, who has some difficulties controlling her impulses. She is more likely to strike out physically, which is not okay. As part of the intervention into one of their episodes, we correct and give consequences to our daughter because violence is not acceptable, unless in defense of your life. We also give my son a consequence because he intentionally provoked the conflict. He thinks we are not smart enough to understand the dynamics of conflict and that we see the physical attack but can't find out why our daughter felt compelled to do so.
The White male students deliberately provoked that conflict, likely comfortable with the idea that they would be perceived as "victims of irrational minorities" and that appears to be exactly the response of the school. Her actions were likely not a good idea, but they were a response to a completely deliberate provocation based on the knowledge that systemic racism would protect the offenders. "I am not doing anything but wearing a shirt and having a sticker on my computer. Something tells me that those guys would not wear that shirt or display that sticker in areas of Tempe where people of color hang out. The whole campus is a safe space for White guys.
The idea that one incident "probably torpedoed their efforts..." also shows that the expectation is for people of color to continue to grin and bear deliberate acts of racial animosity. It is on us to control ourselves while those assholes get to do what they want. How is that acceptable?