I think he's got a bee in his bonnet about LA in paticular.
It looks to me like LA has been singled out and he's got a vendetta.
I thought that when LA's rivals were found out as drugs cheats. LA was always under the most scrutiny, but when his team turned some of that scrutiny onto his rivals, they got caught. So for that reason I think it's funny. but that would explain why he has a vendetta against LA.
I don't know why LA in particular is a fraud. At worst, he is no worse than the other drugs cheats he beat. How come the ones that got caught aren't as much of the problem?
I've never thought of LA as a promoter of drugs use in sport either. from reading his books, I'd say the opposite.
If LA has been getting away with cheating because of corruption, then yes, he should be brought to light, but much more so those corrupt figures of authority.
Personally, I think they're upset because an American dominated their race for so long. If he was French he'd be a national hero.