The detention of Mahmoud Khalil shows that none of us are safe. He had a green card and engaged in legal protest as a moderator between students and faculty. If his green card can be revoked, then YOUR green card can be revoked. Then YOUR visa can be revoked. Even your citizenship is at stake. Are you a naturalized citizen? What makes you think they won't revoke that, too? We are in incredibly dangerous territory that should horrifying ALL of us.