<human>: Can you provide a brief rundown of the text in within 3 sentences?

Quick background: I live at home, where we have 3 generations under one roof, including my brother and his family. As a result, I see my nephew every day.

When he was between 1-2 years old, he was very well behaved and adorable. However, it seems that in recent months, he has developed very poor behavior and also somewhat violent. He developed a penchant to hit and shove other kids, then laughing about it as if it was all in good fun. He doesn't seem to understand it, even when the other kid is crying. He also started doing random things like spilling all the food on purpose when other people, like my dad, offer it to him. He was scolded and punished for that because my mom witnessed it and told my brother. My nephew appears to only be afraid of my brother and his wife, i.e his mom and dad. Everyone else scolding him he simply stands there with a blank look, as if ignoring you.

This morning I was still asleep, and he kept knocking on my door loudly, rudely demanding he be let in. He was practically yelling "LET ME IN! I WANT TO COME IN!". I did let him in, just to shut him up. Then, as I was heading out to breakfast, I didn't want him to remain in my room because he has a tendency to mess up everything in my room whenever he comes in, he spat at me and then laughed about it. I told him he should not be spitting at people because it's rude, and he spat at me again, and again he laughed about it as if it was just a joke.

I'm not sure if this is something I should be "snitching" on him to my brother about, or if I should just continue what I've been doing - which is starting to ignore him. I don't enjoy interacting with that kid anymore, and don't wish to be around him too much. I used to really like the kid because he was adorable and innocent, now he just seems like an evil little tyrant who knows exactly what he's doing and thinks he can always get away with it. I'm just annoyed by him now.

How should I tell my brother about this? Should I?
<bot>: Nephew used to be adorable and innocent, now he is evil, violent and annoying. Should I tell, or just ignore him?