Excellent letter--I think we should e-mail all our friends and family and encourage them to do the same. Also, the President of the University needs to be called to task about dismissing this so easily as "free speech".
You are exactly right. This should become a HUGE email campaign to this Prof and to the President of Columbia.
Email all of your friends and ask them to email thses people and then forward it on to their friends ... and so on, and so forth!
Get the email chains going!
All the way to Baghdad. Let's Roll!