The massacre was a crime against humanity.

这场大屠杀是一桩反人类的罪行。

《牛津词典》

He committed a crime against humanity.

他对人类犯下滔天罪行。

youdao

Such cruel behavior goes against humanity.

如此残酷的行为违背了人性。

youdao

The court can try people for genocide, war crimes and crimes against humanity when their own countries are unwilling or unable to.

VOA: special.2010.06.21

The office said the behavior of the military and the rebels could meet the legal meaning of war crimes and crimes against humanity.

VOA: special.2009.05.16

Joseph Kony is charged with crimes against humanity and war crimes.

VOA: special.2009.06.01

But government opponents say the "crime against humanity" has "dire consequences for justice".

BBC: Cairo police beating: Victim Hamada Saber blames police

The Polish Prime Minister, Donald Tusk, called it a war against humanity itself.

CNN: WWII anything but history for Poland

Using a relatively recent innovation, Microfilm patented in 1925 Karski assiduously recorded mass murder and crimes against humanity during World War II.

FORBES: Disruption at the Intersection of Technology and Human Rights