@Kcup,
“professor Menachem Friedman of bar ilan in a published a study on chabad history, says the student records of the Rebbe as a student in Berlin, and in Paris state he never graduated and dropped many courses”
If you actually want to know what went on in Paris and Berlin, look it up in The Early Years, by R Boruch Oberlander (a shliach and respected dayan and posek in Hungary) and others.
Professor Friedman and his buddy Samuel Heilman have long discredited themselves as unbiased objective researchers with their blatant anti religious opinions. This isn’t the first book they’ve written, and they hate all frume Yidden, not just Lubavitchers. If you would like to see a rebuttal of their book, Rabbi Chaim Rappaport of London wrote one.