I must be retarded because I don't get his argument against "taxation is theft". He basically admits taxation is theft with "What's theft? It's taking something without permission. So it's true that taxation is theft" but then somehow debunks it? Someone help me out here.
As far as I understand, he think "murder is wrong" is more of a moral rule of thumb. This applies to taxation too.
Sometime it is necessary to shoot would-be aggressors in the head. That is in some sense, a murder. He argue that some problem could only be solved with coercing people to give up a small amount of property.