Taking all your quotes and info from anti organisations is pointless.
That Mori poll probably only sampled something like a couple of hundred people and that is not enough to represent the population.
Probably mostly inner city people who would be anti, plenty of farmers in the country would be pro.
Get some information from non-subjective sources.

Puppies don't feel the pain, they havent developed the nervous pain system.
Not many animals eat when in pain...
Ever seen a puppy not feed due to having a tail docked?

I don't believe the tail is the only way of communication.