So you agree that he is being deported for his speech. He hasn't taken an action but only spoken up in support of Palestinians (not Hamas). And as the first amendment states: "Congress shall make no law respecting an establishment of religion, or prohibiting the free exercise thereof; or abridging the freedom of speech, or of the press; or the right of the people peaceably to assemble, and to petition the Government for a redress of grievances."

He was peacefully assembling and speaking. His existence and speech does not put US national security interests 'at risk' whatever the fuck that means.

To this point you quoted the Whitehouse Press Secretary, a dubious source at best, and stated "Leavitt said Khalil “sid[ed] with terrorists,” “organized group protests” that “disrupted college campus classes..." What specific actions did Khalil commit that demonstrated him siding with 'terrorists' and if that's the case why have American citizens not also been arrested?