Angry Newt is less prone to violence and more prone to do a lot of shouting and complaining. He will only do the hitting thing if he's hit first. As for windows, he'll probably just kvetch about it a lot, maybe break something if he gets really pissed. In terms of targeting him for things:

-He also has a leather jacket which he totally loves and will be devastated if anything happens to.
-He honestly actually does really appreciate canned food, because when it's that or starvation, canned food becomes your BFF
-He also likes sleep??? Like, yay sleep?? idk.

AS FOR THE WINDOWS