I am not sure if I am reading your post correctly, but you seem to be saying that the Vegan Soc [the people that started the movement and the first to give it formal recognition and indeed invented the very term veganism] is no longer representative of the movement, and so has no authority to speak on their behalf. Bit like Diabetes UK (DUK) is to us diabetics in a way.
But the Vegan Soc is now teamed with British Heart Foundation, the AHA, and DUK to actively promote the vegan way. There is alo a tie up with the British Nutrition Foundation. Now these latter bodies are the ones the NHS and NICE and now the government is consulting with on health matters, so I would say that they carry a lot more weight than the 1% population that are vegan would normally carry, and this is why many of us here feel threatened by them. They are starting to dictate their WOE onto the world in general, and seem to command the Press and lawmakers to make it mandatory on all of us. This is a political movement, pure and simple.