I personally don’t like the Pan-slav either - they forget that the power of the Slavs was that
1. they accepted a lot of people and acculturised them - Chopin was half-French and there were plenty of Tatars, Germans etc. who became Poles and Russians. And of course Russia’s national poet was 1/8th Ethiopian
2. Some try too desperately to push slavic history beyond the 6th century. Almost as desperate as Afrocentrism. There is no need for either, Slavs may have a shorter history but they have a deep one as well