And we thought prison had mellowed Teresa Giudice! Asked about her worst celeb encounter during a recent panel discussion with her Real Housewives of New Jersey castmates, the 45-year-old launched into a xenophobic diatribe against Sofía Vergara. “Ugh, I can’t stand her, sorry,” Teresa ranted, bashing the Modern Family star, 45, for being rude when a Bravo publicist asked the women to pose for a photo together at a recent event. “I hate to say that, because I’m Italian, she’s Colombian. She has an accent…more of an accent than me. You would think that she would be nice — she’s an immigrant!” (Said the woman whose parents emigrated from Italy and whose husband is likely going to be deported there after he gets out of the slammer!) Teresa went on…