Invisible to all but a select few …

… Marxist Spirit Underpins Campus Protests | RealClearPolitics.

Both systemic racism and systemic sexism are said to be invisible, pervasive, and toxic. Neither is subject to standard criteria of evidence and argument. Indeed, to seek facts and reasoned analysis, according to the theoreticians of systemic oppression, is to show complicity in all-embracing structures of injustice. 

Invisible. No evidence of it. No argument on its behalf. Sounds like make-believe. Maybe we should make fun of it.