Should I time out someone on twitch when they call someone a dog in the chat?

I'm a moderator at a streamer.

Joa for a few days i would be approx.

maybe he will learn from it, and if not then timeout or ban longer

Of course, stop direct insults immediately and knock out a 10min TO.

Check his chat history, should it just write nonsense then Perma Bann directly.

I always do it that way

No, admonish him and next time time out him for 1 hour

Clear.