Actually, I don't think it was as understood in the 70's what Polanski had really done. All I ever heard at the time was that "Polanski had sex with a 13 year old @ Jack Nicholson's house". Having heard no particulars, I imagined a 13-year old who looked older than 13, and a wild party going on, and Polanski "not realizing what he was doing". Maybe a lot of people labored under a similar misapprehension.
However, after reading the girl's unsealed Grand Jury testimony, it is clear that Polanski deserves NO benefit of the doubt. 1.) He targeted that girl by implying he could make a model out of her. 2.) He knew she was 13 because he had to get her mom's permission to photograph her. 3.) He took her to Nicholson's pad to have sex with her. 4.) He plied her with champagne and quaaludes. 5.) He forced himself on her in spite of her refusal.
This is really an ugly, blatant case of child rape. I have no respect for anyone who would defend this pedophile.