inhibits the work of
human rights groupsWhat human right is advanced by communicating with any organization whose tactical objective is genocide? The conflict with HAMAS is existential. Their Charter quotes the infamous genocide hadith.
"The Day of Judgement will not come about until Muslims fight the Jews (killing the Jews), when the Jew will hide behind stones and trees. The stones and trees will say O Muslims, O Abdulla, there is a Jew behind me, come and kill him. Only the Gharkad tree, would not do that because it is one of the trees of the Jews." (related by al-Bukhari and Muslim).[Article 7]
The only thing to say to an existential enemy dedicated to your destruction is "go to Hell!". That statement won't violate the material support law.
The human right at stake is the right to live, free from aggression and the threat thereof. That right is violated by HAMAS. Nothing you can say to them will reduce their determination to perpetrate genocide. Only a damned fool thinks otherwise. Only a traitor claims that HAMAS can be pacified.