Jehovah's Witnesses make sin (lying) their second nature.
(Thus making themselves judges I quess because their sin is OK, but my sin is not OK).
Taking Christ's rightful place and lying is a sin.
Enslaving human beings is a sin.
Do you not see a pattern here Twitch?
Jehovah's Witnesses say "come with us. We are going to make Earth a paradise".
Organized crime says to the pretty but poor ladies and gents of (pick your country) and say "come with us. The USA is a paradise". But it's not.
How is this related in any way to your OP?
They lie but they live with a good conscience . Actually they teach their idea of a good conscience is the ONLY way to a good conscience. SEE? I am introducing the possibility that they are at fault for leaving an easy way for badness. They suffer so the wicked man won't suffer. You said so yourself in your post;
Because it's not sin to them; that concept exists in the mind of the believer.
Also, if they're happy and satisfied, what's the problem exactly? Wouldn't a god of love want his children to be happy?
Even if it is sarcasm, it's true for some people.