Here's another credible source who believes the abuses are crimes against humanity.
Throughout Israel and the occupied territory, the Israeli government has imposed a two-tiered legal and political system of systematic discrimination and oppression to maintain the domination by Jewish Israelis over Palestinians. Experts and human rights groups have recognized that this system satisfies the prevailing evidentiary standard for apartheid, a crime against humanity.
Israeli authorities and security forces consistently employ violence and inhumane acts targeting Palestinians, including arbitrary and extrajudicial killings, torture, the denial of fundamental rights and collective punishment.
https://www.globalr2p.org/publications/atrocities-present-past-and-future-escalating-crimes-and-consequences-in-israel-and-occupied-palestine/