Julian Cope presents Head Heritage

Drew there is something I have never understood about the Scottish Greens.
Considering the UK is small enough as it is why wouldn't it serve their aims better to be part of the biggest pool possible?
Why seek breaking away (they did and do support separation) when likeminded people always can achieve more the bigger the amount of likeminded people get together?
The Greens consolidated as a UK force surely would work better, no?
The SNP's reasons for wanting separation are about a belief that Scotland somehow thinks differently (or something).
Though I struggle to understand what that means there is a certain purity in it.
Just never got the Green position myself though.