Practicality of theory

[john]

just some questions about social anarchism i dont understand
If violence is always wrong to use in defense of mere "stuff", why do you support violence against home invaders?
-Would anarchism involve money? If yes, how would you stop people from loaning it out at interest to others who wanted to buy stuff from the capitalist territories? If ypur vision of anarchism demands that all vestiges of capitalism anywhere in the world be wiped out, how can that be libertarian? If there would be no money in anarchism, how would people know how to efficiently manage scarce resources (such as if one kind of steel to be used in building a bridge is more reliable than another kind, but is much harder to find)?
-If your solution is that everyone "compromise", doesn't that miss the point of political philosophy, which is what to do when people don't agree?
-What's the difference between property and possession? If I run a store out of my home, can I kick out people who try to steal stuff, since my home is a possession?
-How can you have markets without property, if markets depend on people being able to deny access to things they don't have a personal use for?
-If I spend all my life building a boat, is it okay for someone else to destroy it, since it's just "stuff"?
-etc.