The demo crew doesn't just show up on a bulldozer and start demolishing a house. There is a lot of work that goes on prior to the demo work starting. Electric and gas disconnected, appliances removed, verification no chemicals are inside, verification no asbestos is present, etc. Therefore, the hypothetical situation of a demo crew rolling up off the street and starting demolition is absurd and unrealistic.
Therefore, the hypothetical idea of shooting someone in such a situation is ludicrous and continuing to argue over it is also.