Unfortunately for me, I know I’d go overboard.
Local cops are going to go for destroying the dog as it is a known biter
Pray for the neighbor even if through gritted teeth of anger. Keep praying the same prayer out loud to God for him. Trust me it works, and you will be amazed at the results (and not just with your own disposition other miracles will occur). Far better results than anything you could do yourself.
I speak not as a theologian or a Bible expert of any stretch only as a man with the same experience as you. Prayer works, it’s a fact, you can take that to the bank.