I don't fault Lance for doping - everyone really was doing it. He was just better at it. Or, perhaps, his doping was no better than anyone else's, he just really was better. We will probably never know the answer to that. And I generally think this lawsuit he is facing is BS - USPS got the exposure it paid for because he was doping. They got what they wanted.
But, Lance was a horrible human being to anyone who questioned his success. He actively worked to ruin the careers of those people, often successfully. That is what, in my mind, is truly unforgivable.