The Franks (they were Germans) were extremely violent when they bloodily militarily Christianized the Slavs. The Franks committed genocide against the Slavs.
The only sure things now is that they spoke a Germanic language and that they were Christians. Pretty unusual for a Slavic group until the 9th century, wouldn't you say?
It is true. Slavs had very advanced, progressive esoteric spirituality (no animal sacrifice, no idols). They hated the primitive pagan bloody dogmatic cult of Christianity. Saint Stephen also committed genocide on Slavs during the Christianization process. https://en.wikipedia.org/wiki/Stephen_I_of_Hungary
Christianity is a disgusting, perverse, demonic cult of blood ///, link, click here
Unknown academic knowledge about the bloody crimes of the church: the spread of Christianity, violence and genocide ///, link, click here
Violent and military Christianization of the Slavic tribe Lutici ///, link, click here
The crusade against the Slavs ///, link, click here
Violent Christianization of Lusatian Serbs. War with Franks ///, link, click here
Slavic fortress Raddush against military violence of Christian Franks. Franks wanted violent conversion of Slavs to Christianity. Now a perfect tourist attraction, showplace ///, link, click here
"Pagan" uprising in Poland ///, link, click here
"Pagan" uprising in the Czech Republic ///, link, click here
Examples of Christianity stands the power ///, link, click here