The protests here were non-violent and non-destructive, to my understanding.
But in all cases, what I'm conjecturing is that the "actions have consequences" framing distracts from challenging the authority's own actions. With what I argue is the more honest framing, you could still conclude that a punishment (such as for a violent protest) really was justified - just that you'd have to defend that on the grounds of that retaliation being beneficial to society, opposed to a lazy "well it was expected" as if it's an immutable rule not subject to moral judgement.
Or to put it another way:
* If you step out in front of a car, the driver couldn't stop in time, and thus it rams into you - that's a consequence of your action
* If you step out in front of a car, the driver sees you and stops in time, but then later decides to intentionally ram into you to teach you a lesson - that's punishment/retaliation
Your action and the end result are the same in both cases. Yet while "what did you expect?" may be valid for the consequence in the first case, that same outcome as an intentional retaliation is clearly excessive and unjust. We, rightly, apply vastly different standards to natural consequences and intentional retaliation - and thus shouldn't frame a retaliation as a consequence by ignoring the moral agency of the driver/authority.
> I'm not sure why anyone would think they could [...] wouldn't have consequences.
Why is it only the authority's actions that are treated as immutable? If you flip it to treating the protestor's actions as immutable, you could say:
* If the university invests in Israeli corporations/weapons manufacturers and hosts a former IDF soldier to talk on Israel, why would they not think there would be repercussions? They should just accept the consequences of their actions.