A year ago, hundreds of migrants and refugees lived in the barns of the Kárász farm near Horgos on Hungary’s southern border. Those crossing the border illegally used to leave here at night to get through the barbed wire fences. Today, discarded energy drink cans and remnants of tents are the only signs that people once lived here. The roof has collapsed, the nylon sheeting protecting the windows has been ripped off, and the whole area has been pummelled by weeds. For a year, the Serbian authorities systematically evacuated the farm and collected migrants from the surrounding area, transportin…