Weird friend problem?

whenevr i am jokin around with her she tweaks out on me and takes it seriously... i usually take it but she asked me if i was a jew idk why but i said why the ***** do u think im a jew...and she said well you dont have to be so snappy...and she is saying shes pisssed so stay away from her... i have tried to confront her but idk what to do anymore.... she always pissses me off...