"I think this passage is saying that it is OK for God to create people for the express purpose of punishing them in hell"
This makes your god a sadistic bastard.
"What is wrong with creating a person who belongs in hell and then sending them to hell"
What makes them belong in hell? According to you, god created us, and makes us do evil. So it's really his fault. He should send himself to hell.
If they belong hell and God sends them to hell, what is the problem
The problem is that you haven't said why they belong in hell. If god creates someone just to go to hell, and makes them do evil, then that's all his problem and fault, not that persons.
Creating a person who belongs in hell and then sending them there is just as legitimate as creating a person destined for heaven
Repeating the same thing over and over using different words doesn't make it any more true.
No one is going to be unjustly punished in hell
Actually, everyone supposedly going to your fictious hell would be there unjustly. The only person who deserves hell is your sadistic, bloodthisty, egotistical god. I'm almost surprised that you or anyone else can't see this. Of course, it's RR, so I'm not that surprised that people don't understand anything at all over there.