One thing that has impacted on my view of this subject is the "Corporate Salvation" issue.
The WT, whilst paying lipservice to "individual relationship with God", has through it's "Faithful Slave" teaching, lead people to view the organisation as an "Ark". You have to recognise that the organisation is God's exclusive channel and be "in" or "on board" to be saved or stand a chance of being saved. No other group offers any hope of God's approval and personal salvation.
I no longer believe the above.
However the flipside of "Corporate Salvation" is "Corporate Condemnation"
I'd define this as the belief that if you choose the wrong group and mistakenly identify it as "God's Channel" and look to it for spiritual direction, far from being safe in/on an "Ark" you are actually on a sinking ship, doomed to go down. Or if a group or denomination seems to be generally ok but has some "disqualifying interpretation or doctrine" then God will automatically reject it as worthless along with any who "sail on her"
I no longer believe that either.
I truly believe that all that matters is a personal belief/faith/relationship with God
Therefore God as a "friend" is truly interested in "me" as opposed to whether I've backed the right horse, joined the right club or wear the right badge.
This being the case, I believe that many JWs are "saved" as well as a much larger number from other groups (simply because numerically they far outweigh JWs)
I also believe that many "smug" people may not be but it's not for me to judge.
In otherwords looking for a group may not be helpful because a denominational badge does not guarantee uniformity across a city never mind a country, continent or the globe.
Statements like "I once went to a Baptist church and they were mad/rude/unfriendly/un-Christian/unscriptural/ so I'll never step foot in one again and they definitely can't be the "True Religion" become nonsensical.