I think that racers who dope - and I take that to be the majority of pro riders - go through something pretty weird having to constantly lie not just to others but also to themselves about how they survive in the terribly harsh world of bike racing. They feel doping is the only way, yet of course they can't say that out loud... until they're caught. Then, they can bury themselves in a hole, or try to fight back. For the few guys that were caught and exposed with somewhat more energy than others, like Floyd Landis and Tyler Hamilton, it might be particularly frustrating to find that they are treated as black sheep when they know that the whole peleton is just as dark as they are. It might be even harder because their whole identity is centered on bike racing, it's not like they have a life, a profession, something to connect with outside of pro cycling. So their attention may become focused on what they perceive as the ultimate symbol of hypocrisy, in this case Lance.

Yes they are sore losers, but I have a lot more sympathy for them than I have for those who win and keep their image. I see them as little children more than like grownups.

This interview with Landis takes a very long time to read but for me it really was interesting not just about what it says about bike racing, but what it says about human beings. Whether or not one believes Landis is not really important in my opinion...
http://nyvelocity.com/content/interv.../landiskimmage