Yes, this would be the accusation / claim from the left, as of yet, this hasn't been supported with citations documenting such.
Well, you've dropped allot from that quote, apparently taking it out of context.
"because you want to participate in movements that are involved in doing things like vandalizing universities, harassing students, taking over buildings, creating a ruckus"
"participate in movements" that are "doing things like vandalizing universities, harassing students, taking over buildings".
Would be fully in context, would it not?
The intent which I read from the quote, which appears to be pretty clear, is students on student visas shouldn't participate in 'vandalizing universities, harassing students, taking over buildings'.
Hmm.
So what did you mean by 'Rubio worried about visa holders associating with the Proud Boys or going to Trump rallies'?
I reads like you are fabricating a hypothetical, at least not demonstrated, to counter something which we do know happened, i.e. student visa holders participating in 'vandalizing universities, harassing students, taking over buildings'.