Its amusing how all four of the points you raise are false:
1. The initial prosecutor threw the case out, but a second senior prosecutor took up the case on request from the victims.
2. Assange was not told he was free to leave Sweden, infact his lawyer was specifically told they wanted to talk to him again and he should contact the police before leaving Sweden.
3. No Swedish or Interpol law was contravened by the issuance of Assanges warrant - infact, this is exactly the sort of use they are for.
4. All UK courts where this case has been argued has actually both affirmed the legality of the arrest warrant, and affirmed the right of the Swedish to issue it. No UK court has ruled it illegal, and most certainly no UK court has said what you claim they have said.
How about you get your facts in order before claiming bullshit, k?