Israel "Mass graves" at Gaza hospitals - Alleged-crime, or accumulated casualties?

[Robert]

The Media seem to be discussing the U.S. student protests in support of Hamas, as a protest against Israel which is leading to anti-Semitism impacting Jewish students, whereas it is anti-Semitism that is at the basis of support for the Palestinian Arabs. 
How can this be detected? The typical allegations against Israel lack objective evidential basis.