Sinn Féin is sacrificing Stormont to sideline DUP in Brexit negotiations
Sinn Féin acts and sounds now like a party that can contentedly lose Stormont. Clearly there will be some cost to the party in lost jobs and funding but it is facing into the current crisis with the air of not really caring very much whether the Executive is restored or not.
This may be tactical, an effort to freak out the DUP.
Arlene Foster's party wants devolution to work for the simple reason that it has so little else to engage it.