At this point I agree it's all about the proof (if any) they can show to support their allegations. This could be a real edge case: for example, if it can be established that Khalil was in a leadership position at CUAD (and was not just a "negotiator") and had a role in pro-Hamas statements or the distribution in some of the vile pro-Hamas literature allegedly distributed at Barnard praising Sinwar and Oct. 7, it might meet the definitions you cite in US immigration law. We'll see.
At this point I agree it's all about the proof (if any) they can show to support their allegations. This could be a real edge case: for example, if it can be established that Khalil was in a leadership position at CUAD (and was not just a "negotiator") and had a role in pro-Hamas statements or the distribution in some of the vile pro-Hamas literature allegedly distributed at Barnard praising Sinwar and Oct. 7, it might meet the definitions you cite in US immigration law. We'll see.