Steve2 said
Now if JWs approached you on the street and, unsolicited, boldly declared your baptism to be invalid, your reaction would be understandable
But . . that's what they do, isn't it? Except for the "boldly" part. They accost people in the street and at their doors, unsolicited. They disguise the message "you are not a true Christian" until they have established ascendency in a "bible study". They invite unsuspecting believers and atheists to their "memorial" as a first step to telling them how bad and wrong their belief system is. And . . .is the baptism of a non-jw ever regarded as valid?
In my case their only interest in my beliefs was to pick them apart and try to convince me of flaws. Of course, it wasn't a reciprocal exchange of views.
Showing them how their beliefs and practices look to an unindoctrinated outsider might just give them a glimpse of the real world.
Retro