I think there can be a lot of love amongst Witnesses. The problem is that it is conditional.
If you watch The Path on Amazon there is a character who is removed from the cult and goes to see another person who has been out of the cult for help. The guy can't help him and as he is leaving the character says...
"I wish I hadn't believed you lost your worth when you lost your faith"
This is exactly what happens with Witnesses. You lose faith and you lose your worth, your human capital, with those still in.