You said "According to the Bible, if an owner knowingly has a dangerous animal and He does not confine that animal and it harms someone, the animal is to be put to death and the owner is to be held responsible for any damage that is done to that person. And if that animal were to kill someone, the owner would get the death penalty."
The bible truth is: if an owner has an animal that has attacked a person previously, and the owner is aware of it and has not kept the animal in and the animal kills a man or woman, the animal and the owner shall be killed.
Do you have any proof this dog "Max" has previously attacked somebody? And don't stereotype the breed of dog, that is not what is meant in the scripture. Moreover, since you like to throw scripture around:
Exodus 22:4 If thou meet thine enemy's ox or his ass going astray, thou shalt surely bring it back to him again.
Proverbs 12:10 A righteous man regardeth the life of his beast: but the tender mercies of the wicked are cruel.