Aaron Lund, a fellow with The Century Foundation, said that "it would be hard for Erdogan to back down at this point" following such "loud and persistent" threats.
Children and elderly people are dying of malnutrition and lack of medication.
Stein said there was a "recognition in Washington that this is a Turkish show" and "little to be done to dissuade Erdogan" if he chooses to go ahead with the incursion.
Amnesty International publishes State of the World’s Human Rights report for 2017 to 2018 “Last year our world was immersed in crises, with prominent leaders offering us a nightmarish vision of a society blinded by hatred and fear.
The report, The State of the World’s Human Rights, covers 159 countries and delivers the most comprehensive analysis of the state of human rights in the world today.
The Syrian government, backed by Russia, is bombing its own people in Eastern Ghouta.
The casualties included three Syria Civil Defence volunteers who had rushed to the scene to assist.