AITA for leaving the game and telling them to grow up?

I (21F) like gaming a lot, mostly Fortnite and Call of Duty.

I play with some of my online friends, and I know gaming can be frustrating and difficult sometimes.

My friends (M19-23) start getting mad really quickly. After a couple of rounds of the new Call of Duty, they began making racist and homophobic jokes about the opponents.

That made me really angry, so I left the match and told them to grow up before leaving. Now, I'm getting messages from them saying that I need to grow up and that they weren't being serious-it was just their frustration talking. AMITA?