/ Poland is great Mother of all Slavs from Baltic to Balkan
you have to understand what panslavism means and who was proposing this idea in past time
pan slavism sounds like pan germanism but they are not the same
from wiki the view of panslavism from the Polish perspective
Although early Pan-Slavism had found interest among some Poles, it soon lost its appeal as the movement became dominated by Russia, and while Russian Pan-Slavists spoke of liberation of other Slavs through Russian actions, parts of Poland had been under oppressive rule by the Russian Empire since the Partitions of Poland. Historically, Poland often saw itself in partnership with non-Slavic nations most of the time, such as Hungary, or Lithuania under the Polish-Lithuanian Commonwealth from 1569 to 1795. The influence of 19th century Pan-Slavism had little impact in Poland except for creating sympathy towards the other oppressed Slavic nations to regaining independence. At the same time while Pan-Slavism worked against Austro-Hungary with South Slavs, Poles enjoyed a wide autonomy within the state and assumed a loyalist position as they were able to develop their national culture and preserve Polish language, something under threat in both German and Russian Empires. A Pan-Slavic federation was proposed, but on the condition that the Russian Empire would be excluded from such an entity. After Poland regained its independence (from Germany, Austria and Russia) in 1918 no major or minor force considered Pan-Slavism as a serious alternative, viewing Pan-Slavism as little more than a code word for Russification. During Poland's communist era the USSR used Pan-Slavism as propaganda tool to justify its control over the country. The issue of the Pan-Slavism was not part of the mainstream political agenda, and is widely seen as an ideology of Russian imperialism.