No surprise. Poorer students are less likely to attend better known residential colleges that are more likely to have big name potentially controversial or inflammatory speakers in the first place. Such speakers probably do not have schools like CSUDH on their preferred list of school to have events at.
At my commuter college, which had only lower and middle class students (i never met anyone I would consider rich in my time there), there were no demonstrations but one, which revolved around a popular teacher. I honestly can’t remember what the deal was, although I did join the protest. As I do recall, most of us students had to work so we set up a shift system for the protests, which lasted about 2 days.