My girlfriend called me a racial slur during an argument. Is that a good enough reason to break up?

[Anonymous]

We were arguing over her older brother. What happened was her friend called her to let her know that he was found on a dating website. I have to explain this so you could understand why I laughed. Her friend had called her during a lunch date and it wasn’t just an ordinary site. Her friend told her “please don’t judge me but I found your brother on sugar daddy dating site.” My girlfriend was pissed off because he has a girlfriend of 7 years who my girlfriend is close to. I couldn’t hold in my laugh. I don’t know why I bursted out laughing. It’s mainly because her friend said “don’t judge me..” and also how her older brother was on a sugar daddy dating site because he works at an auto parts store making $10/hr so why is he wanting to be a sugar daddy? I felt so bad for laughing but I couldn’t contain it. It caused a huge fight where she ended up calling me a “beaner.”

I am wrong a bit for laughing but I’m only human.

[natured]

DUDE, seriously this is a serious matter.
I would do much more than calling you a BEANER.
How would you feel if you find out your sister is on graigslist offering sex for money and your girlfriend laughs?
NOT FUNNY RIGHT?
You're being immature

[Asker]

What else would you do

[Birdlegs]

I would’ve laughed too but if she called me a n***** for laughing it would be donezo

[Avicenna]

that's for you to decide.

[doopayo]

I would take my dignity and leave, hell no.

[doopayo]

If anyone irl has the audacity to refer to me using racial slurs they gon catch these hands

[Anonymous]

What's a Beaner?

[Asker]

Mexican

[Opinion Owner]

Do they grow beans or something?
Mexican women are hot, that's all I know.