Game fisherman have always fished through the greater part of what was the closed season and are still able to on rivers.
The original reason for introducing the close season was supposedly to protect spawning fish. We all know however that it did little to achieve this and indeed led to massive numbers of anglers on the banks just when the Carp/Tench were spawning. After June 16th I have have personally seen Carp/Crucians/Tench/Bream/Roach/Chub spawning.
It has often been suggested (and there is probably more than a little truth in this) that the real purpose of the close season was to keep course anglers off the bank for the best part of the game fishing season.
The effect of removing the close season in my observation has been to get people to fish more when conditions are good and less when they are poor.
The close season is like our drinking laws in this country... a legacy of early twentieth century state paternalism.
I chose not to join any angling organisations because all seem in one way or another to require me to compromise my beliefs. For example I don't like fox hunting and keepnets or the general imposition of a close season. That rules out the BS, SAA, ACA, NAA, NFA and CA to name but a few.
To unite anglers you need to allow them the freedom within your organisations to express their individual views. If you then need to take a stance it should be by finding the view held by the majority after careful debate of the matter in hand.