When I was young, I asked my (pastor's wife) mom
"Why do the most sinful people in the church speak in tongues and dance the most?"
answer: I guess God knows they need more strength so he blesses them more
"Why do people in other churches seem so much happier and nicer than our church people?"
answer: I guess the devil doesn't bother them so much since he knows they are already lost
Now that I am older than she was then, I am guessing my mom probably wondered the same things and was just trying to give me answers that would keep me in church and she probably did not know or didn't want to know the true answers herself.
So why are people not in UPC happier and nicer?? Because they are not in bondage; they are free to enjoy the joy of the Lord without condemnation. As for the dancing, tongue talking sinners, we all can guess what that answer should have been . . . . .