The Daily Mail (UK) (Claudia Aoraha) reports (see also N.Y. Post), and includes this screenshot:

I think the student who wrote the message should have every right to express her views, including views that support the killing of civilians. I most certainly don't share the student's views, and I do share the distinction that modern norms generally draw between directly targeting civilians (which is what Hamas has apparently done) and targeting military targets even when some civilians are inevitably killed. I also think we shouldn't forget that the Hamas Charter is expressly committed to "struggle against the Jews" and the destruction of Israel (rather than just a shifting of the borders), and stresses a passage from the sayings of Mohammed stating,