and animals dont have souls,

Well, neither do humans, but we care about those for the most part. Also many people care quite a lot about their pets.

I dont think it should be punishable by law, and especially not on paper like a record

Well, I very much think it should be. Guess we just disagree on that point. Though I do agree there should be a mechanism to clear juvenile records of people are rehabilitated/don’t re-offend.

And maybe, just maybe it was him releasing steam which is better on an animal than human

Well, maybe next time he should try a tree or something.