alt Hacker NewsI just used Wikipedia as a quick reference in English. There is clear evidence that the practices of ancestors worship and their ancient practices involving these stones was directly linked to Christian persecution, including documented examples of the progroms against the indigenous Europeans starting immediately following crusades and effectively being part of them.
Can you provide some references to that. Also I've never before heard about Christian crusades earlier than the late 11th century one started by pope Urban II. Perhaps you are thinking about peoples like the Wends in Arkona (Slavic "pagan" tribe in northeastern Germany), who were force converted into Christianity in the 12th century. If they somehow were worshiping the stones in question, then that sounds more like retrofitting existing ancient monuments into their own religion, rather than keeping some ancient knowledge alive.