I think the destruction and the chaos he expects to come if he destroys the Veil is something similar to what happens to spirits when they are drawn through the Veil they go mad and turn into demons . In this case , I suppose the world would be going mad . Imagine that ordinary people would wake up to live their lives as if they were liquid dreaming , with all new magical abilities . Most of them wouldn ' t be able to handle the new reality but they would be able to shape it ! Bang , instant chaos . People , basically everybody who has never lived in a preVeil world , would be destroying themselves or others in their panic . At least this is what I imagine when Solas says that Thedas would burn in raw chaos .