Speaking on Sky Sports, Keane said: "Managers are coming out every week saying every decision is against them. Just come out and accept it.
"Deep down he'll be satisfied with a point. Show a bit of class, manager of Arsenal. He probably deserved the red card, we reacted well and we move on. That's the end of it. Take your medicine and move on. Show a bit of class.
"But from the Arsenal point of view, I think they'd be OK with it, because he’s obviously passionate and you're not in this job to be liked! He's there to win football matches for Arsenal and that’s what he’s doing.
"Listen, he's got the yellow card, he has to take his medicine, but I generally have no problem with it. We see other managers doing stuff that we might not always agree with but they're emotional, they’re passionate and I think that's just because he wants to win. I wouldn’t be too harsh on him."