How wars start? Have you overdosed on the drama queen pills tonight? In your own words "you cannot understand", so let me simplify.
1. I really want Forest to lose every single game they play.
2. If they loan us a player, I want that player to do really well for us.
There is no hypocrisy at all there, the two points are entirely compatible, and I would be surprised if I was the only Notts fan to think that way.
If you want to say to them "thank you so much Forest for loaning us a player, best wishes for your season" you are perfectly entitled to do so. Personally, I would rather have my balls crushed in a vice than wish them well.