Where's the ACLU?

From a fundraising letter sent by David Horowitz this story:

Like so many -- too many! -- young conservative students in America, Ruth found herself being singled out for abuse by a professor who simply hated Ruth's political views. Ruth -- an A-student at Georgia Tech -- mentioned to her professor that she was going to attend the conservative conference sponsored by C-PAC in Washington, D.C.

Without batting an eyelash, the professor told Ruth "Well, then, you will probably fail my course." Can you imagine the arrogance and sense of superiority this professor must have assumed when she unflinchingly told Ruth she was going to see to it she failed?

Her next exam -- a subjective essay test -- was returned to her with a failing grade. Eventually, Ruth withdrew from her class.

Since they're in the business of advocating new rights, shouldn't the ACLU be fighting for the right to be educated without political indoctrination?