@obras62:
Two things. First, it is their right to protest about anything, second, what is is about the 'Sanctuary status'? I mean if you're a student you can have a student visa and stay to study. If you are illegal then you are paying for the education yourself because you don't get financial aid if you aren't a citizen.
You said it: if you're a student you can have a student visa and stay to study.
It's already by de jure
and nobody wants to revoke that.
What they're asking is pointless if it's limited to this interpretation.
What they hope to do is to turn colleges and universities into day cares for illegal immigrants.
That's concerning because every educational institute should teach a student to respect the law, not to break it.
It's your right to protest against a policy you do not agree to,
it's not right to ask institutions to turn into an illegal black market of protection.
Yes an illegal would be paying entirely the fee, but financial support is partially given directly (everyone benefits).
It would be an aggravating if taxpayer funded colleges and universities will become a beacon of lawlessness.
This is concerning, not in the protest per se, but for the background:
you do not understand how to get what you want
because your education did not teach you how to use your skills in the most effective way
(I agree with you on this: let's vote, millennials might have changed everything),
and because nobody understand anymore what should be legally doable or not.
Remarking again: one of the many symptoms of the American school system quality ::)