Mahdawi allegedly supports Hamas. Hamas is officially designated as a Foreign Terrorist Organization (FTO) by the State Departmemt. This designation means that providing material support to Hamas is a federal crime under US law. Green card holders or anyone in the US can face serious legal and immigration consequences for any form of support or affiliation with Hamas.
I don’t particularly think it applies to this case, tbh, given that his actions were focused on Palestine, not on Hamas, but I am curious if there’s any existing legal basis for the claim that someone could be convicted of such material support simply for saying, for example, that the IRA wasn’t unreasonable given the situation at the time.