I don't see how it enters the realm of correctness if by correct we mean leading to something we desire. It is true the newspapers, and liberal freedom of speech in general, are not actually free but beholden to Capital. However, destroying the papers did not alter or even illustrate this fact -- it was easily read as mere group animosity (as if the students were a fraternity or athletic team which had been insulted.) The action was blurred and vague -- as, in general, the entire reparations discourse has been. I think it has been broadened when it should have been sharpened.
On the other hand, by drawing attention to Horowitz's clowning, it did advertise the reparations issue. So it wasn't entirely bad.