As Searcher said:
Don't try and turn loved one's heads with a baseball bat - use a feather duster.
I was in a state of shock when I discovered for MYSELF the lies about Memorial partakers. If someone else had HIT me with that info, I would have closed my mind and ears immediately!
There's another recent post (which I would search for now but need to leave for work, sorry) in which the poster explains how he shared with a dear friend that he LOVES the jws, yet he has real trouble with the doctrines about blood (wt changed stance after many died), the un thing (big lie), etc etc.
The dear friend was able to take it all in because it was Non-emotional.
In that sense, and knowing that we all share your feelings about lives wasted...my advice is to "script" an approach that refrains from bashing yet reveals ttatt gently. Use the Feather Duster...more flies with Honey and all that.
Best wishes and welcome back!