See point 2 in the introduction. Why does Israel decline/refuse to requests for information? If one declines to give their side of the story, then that is a red flag.
"The Commission sent nine requests for information and access to the Government of Israel, two requests for information to the State of Palestine and one request for information to the Ministry of Health in Gaza. The State of Palestine and the Ministry of Health in Gaza provided information. No response was received from Israel.
docs.un.org
"The Commission sent nine requests for information and access to the Government of Israel, two requests for information to the State of Palestine and one request for information to the Ministry of Health in Gaza. The State of Palestine and the Ministry of Health in Gaza provided information. No response was received from Israel.