These people volunteered to go home, sure it was probably because they didn't like the detention centre but they went home out of free will. There is no law that says a country is not allowed to not give people a choice or it has to keep them in such pleasant conditions that they will want to stay. They were given a choice stay in Sharonim until its safe to return or we find a safe third country to deport you to or you can go home now by choice with a couple of thousands dollars in your pocket as spending money. If these people went out of free will Israel has broken no treaties or UN conventions its just controversial.
Greek police say bust internat'l migrant smuggling ring, arrest 12 (Reuters)