@lmt
Not sure if this answer your question but here goes
For now ill go accourding to your second way you assumed the sicha which means the concept is correct but some ppl misunderstood it and daven Directly to the rebbe
There is a concept I’m sure you heard of – I forgot the words offhand but its something to do with hashem gave way to the goyim to say things against him by writing certain things in Torah
There were the tzidukim baitosim and others that learnt Torah and totally learnt it wrong. Are you gonna say that hashem shouldt have given the Torah?? I hope u get what I’m trying to say
The rebbe said a sicha – some ppl may have learnt it wrong but if its part of Torah it has to be said as is. no point of hiding it… Even if ppl learnt it wrong and took it totally out of context it’s still Torah
(you might disagree with some parts but its backed up with mekoros (not as halacha as the rebbe says himself but rather as hergesh – but its backed up with makoros) and unless you know all the mekoros and all the merforshim on them you cant say its kfira)
I know u’ll say “but our gedolim said its kfira” and it’s a mitzvah lfarsem or something similar to that. but that’s a lame excuse. as you say get better tactic. bring all mokoros where you see that its totally against pshat in this – not just “the ramchal or NH says” even if there is one safer that holds of it means that its not kfira even if majority dont agree with that sefer.
Dont either answer abt hergesh that’s not either a question as I just wrote.