My take is simple--bring him back, just like any other captured fugitive. And I'm a big fan of vintage Hollywood.
Not surprisingly this has divided the left coasters and flyovers. To some, Polanski was probably one weirdo among many, feeding the beast. For Hollywood, just another day at the movies. After all the 13 year old seventh grader was, according to him, radiating sexual tension. Some supporters may see a kind of Fatty Arbuckle story here while others see a lech.
But the bottom line is he raped someone, whether 13 or 31. It was not consensual, and even if she had agreed it still wasn't due to her minor status. He skipped town before sentencing and didn't return, and rule of law systems function best when practicing (blindly) the rule of law. Why is that so hard to understand?