Why Are Cyclists So Hated...

They can't call it an emissions charge though as the biggest polluters are exempt- taxi and bus exhaust is hellish beyond belief when compared to a modern petrol (or some diesel) engines.

Damn your logic.
BUT Taxis and buses probably contribute to the majority of London's congestion, regardless of their claims of high conveyance numbers there are still an awful lot running around empty, plus the highway layout is designed to favour them.