Would this be considered hazing?

[MTSUGURL]

Our sisterhood chair is the most wonderful girl in our chapter. She's the reason that the majority of our pledge class even went back the seecond night of rush. she comes to all of our pledge events, did an amazing job with retreat, is always there when ANY of us needs her, and has dropped her plans when a group of pledges showed up at her house needing a place to stay. She happens to be German, and the president and treasurer are constantly calling her "dirty nazi", "jew killer", and several other horrible things. They laugh, but she is so upset she's close to quitting the sorority. I've never seen her cry - she's normally the most cheerful, loving person I've ever met. She's been here four years, and puts so much work and love into everything. This isn't the only bad treatment they've dished out to her, but this is what's upset her most. Is this hazing? How can it be handled?