Re: why people have started rejecting ahadees these days
^ I don't know whats your beef with Qadiyanis, but I think they do believe and follow ahadith from Prophet PBUH, its just that they take 'additions' from GAQ. As far as Shias 'rejecting' ahadith goes, it is because the 'source' of ahadith is not 'ahle-bait' thats why they reject most of ahadith.