Why did Indian doctoral student from Columbia University Ranjani Srinivasan self deport from US?

Ranjani Srinivasan, an Indian doctoral student at Columbia University, self-deported from the US after her visa was revoked over alleged support of Hamas. Her departure highlights increased scrutiny on foreign students involved in pro-Palestinian activism. Homeland Security justified the visa revocation by citing security concerns. Srinivasan's significant academic background includes studies at Harvard and Columbia.