I dont even know what to say. Just wow.

From ALL the possible cartoon characters you (a 26 year old dude with an (ex)Girlfriend) decided to take Eric Cartman as a rolemodel and tried to act like him.

Not just is he a Character that isnt meant to be seen as an example of how to act with other people, hes pretty much the opposite, but also did you really think its a great idea to insult your girlfriend while also insulting her religion? You didnt just call her a Jew you also called her stupid. Also did you reduce her whole heritage to very stereotypical pictures.

It also seems like you just started with this shit because you thought you could have a "fun dynamic" like the characters in your favorite series (which by the way hate each other, dosnt sound like a great dynamic to have with your girlfriend) . Thats just pretty fucking stupid.

Please think about doing stuff like this, and the characters you want to have as a rolemodel. I like South Park too and I like Cartman. But I wouldnt want to be like him, and if you want people to like you, you shouldnt either.

Try to apologize to your Girlfriend, dont do this shit again and then I hope that you two can work it out.