Assange isn't being extradited to the United States, he is being extradited to Sweden. Your example has nothing to do with this case. The women making the complaint say that Assange assault them. There isn't much room for confusion here.
Those are just excuses to get Assange out of Ecuador embassy in London. The rape complaints are very suspicious, they were filled late. Issuing international interpol warrant based on those accusations only is unheard of. This whole case is political and it's clear that he is harassed for his anti-government activity in wikileaks.