It should be as well. Specifically, HAMAS is a US-recognized terrorist organization. Giving aid and comfort to them, money or otherwise, is a crime. Protesters supporting them, flying their flag, wearing their headbands, shouting ‘Death to America’ while doing so, committing acts of violence, riot, and more, should be arrested and treated as enemy combatants, prosecuted to the full extent of the law.
Mere words is not giving aid and comfort.