I absolutely hate my welfare-recipient sister-in-law

Please tell me if I'm the one being crazy and mean here. My brother got married this fall, and my new sister-in-law (SIL) is just... such an eyesore. I can't stand the sight of her. My mom hates her too. My dad doesn't usually talk bad about people, but you can tell he's not exactly thrilled either.

First off, the SIL is a welfare recipient. She's been one since she was a kid, and apparently, once she became an adult and started earning money, she officially separated her household address from her parents just to keep getting those benefits. For the record, she's a high school grad and has just been working part-time at restaurants or convenience stores ever since.