Dorah,
“If you follow a Litvish hashkafah or even a Chassid from a different Chassidus, you don’t need to run to the Ohel to beg mechilah if you don’t agree with certain Chabad practices.”
If one disagrees with certain viewpoints of Gedolim, it’s fine to respectfully say “my Rabbeim held otherwise” or “that’s not my mesorah”. For a little pisher to write that they “were mistaken in their novel ideologies”, that’s unmitigated gall and obligates a visit to kevarim.