For the unaware:

Facebook’s systems promoted violence against Rohingya

“In 2017, the Rohingya were killed, tortured, raped, and displaced in the thousands as part of the Myanmar security forces’ campaign of ethnic cleansing. In the months and years leading up to the atrocities, Facebook’s algorithms were intensifying a storm of hatred against the Rohingya which contributed to real-world violence,” said Agnès Callamard, Amnesty International’s Secretary General.

https://www.amnesty.org/en/latest/news/2022/09/myanmar-facebooks-systems-promoted-violence-against-rohingya-meta-owes-reparations-new-report/

This is in the context of:

The Rohingya genocide is a series of ongoing persecutions and killings of the Muslim Rohingya people by the military of Myanmar. The genocide has consisted of two phases[2][3] to date: the first was a military crackdown that occurred from October 2016 to January 2017, and the second has been occurring since August 2017.[4] The crisis forced over a million Rohingya to flee to other countries.

https://en.wikipedia.org/wiki/Rohingya_genocide