Can animals attack or kill people even if unprovoked?

[D]

Its still no excuse for being bitten though, if you did something insignificant to provoke someone without you realising would you accept it if they punched you?, no, nor should you accept an animal biting you, they should be trained not to bite anybody.

Maybe in your example it isn't insignificant asswipe. Maybe her dog has a pain there? If you had a wound and I shoved my finger in it, would that be reason for you to attack me? Yes.

But thank you for also making my point for me. It isn't the dog. It is the humans involved that are at fault. One way or another.