It deserves a counter reply.
I would make it polite yet nasty. How 'bout this for openers?.
"Kindly know that I am in receipt of your missive today on the issue of your Professor Nicholas de Genova. After contemplating the substance of this reply, I would like to continue this dialogue with you. But in the meantime, might I accordingly suggest that you take your reply to me this day and appropriately insert it into your specific orifice which retains the characteristic of total darkness."