Harvard (and GW and dozens of other schools) are in a bit of a bind as they have been generally hostile to free expression if its from the "wrong" viewpoint, and are now being pressured to take action from Jewish students/alumni.
Personally I'm a free speech absolutist - I'm not suggesting they expel students for projecting "GLORY TO OUR MARTYRS" or even stating that the murder of Israeli families is totally justified. But at the same time we shouldn't fool ourselves into believing that all these groups are simply "pro-Palestinian." Let's call a spade a spade - even it means some tough conversations about what sort of students/faculty are on campus.