[QUOTE=CrackQuack;2504777I will never believe separation is necessary.[/QUOTE]
Necessary for whom? It's not like there is some big committee that decides these things. We decide for ourselves. A while back, a bunch of addicts who were finding the solution in AA felt that newcomers were having trouble identifying with all the drunks. They felt the newcomer addict could be better helped by a fellowship that had a more specific drug problem, and they started NA. Same with CA. Those cocaine addicts in NA couldn't relate to the junky opiate addict. So they started their own fellowship to better meet their needs and the needs of newcomers.
The separation may not be necessary. It's just that the addicts themselves thought it was useful.
Look at all the other 12 Step fellowships. Same obsessive compulsive, irrational behavior toward something, and the same solution (the 12 Steps). But is an over eater or a sex addict really going to identify with the drunk? They don't. So they, themselves, feel it more useful to have their own fellowship.