Some things to remember:

• Protests, riots are almost never monolithic and desperate people and local organized crime almost always takes advantage of the commotion.
• There are already reports of Police antagonists stirring up commotion in these.
• There is a very long history of far-right agitators trying to hijack and smear justifiable legitimate protests. Many examples from the 2020 BLM protests.
• Foreign adversaries -- notably Russia -- almost always seizes on these and has a hand in stirring up division.

So the fallacy is the assumption that the people committing the looting are the same people who originally set out to protest the following grievances:

• Severe under-funding of schools.
• Overcrowded classrooms and lack of air conditioning in excessively-hot climate.
• Teacher shortages and schedules.

To again reiterate, much of the time legitimate protests are hijacked by outside groups for their own ulterior motives (political optics, theft, etc.)