1-Is there anything called Slavic culture at all besides that of early West, South and East Tribes ?
I didn't mention Slavic culture as a homogenous bloc so I'm not sure where you're getting this from.
I was using 'Slavic' as more or less a synonym for Eastern Europe. In this context, it's simply useful to group them all together because they're more or less economically and politically similar, which I think has a lot to do with how favourable certain cultures are viewed in the West.