It’s rampant on college campuses, which are dominated by liberals who scorn Brexit’s “leave” voters as xenophobic, nativist rubes. For example, liberal professors outnumber conservatives 28-to-1 in New England. That’s no accident. And it isn’t the only non-accident in academe. See this, this, and this. (All are dated, which probably means that they understate left-wing control of most campuses and disciplines.)
Oh, there is a semi-bright spot, but it still leans left.