This change is necessary because (believe it or not) the US government defined any organization that raises arms against any government as terrorist. Assadi's story is a perfect example of that. USA is the enemy of Khomeini, and his organization was rising up against the Ayatollah. By logic the organization should receive support from USA, but instead it's labeled as terrorist because it's armed.

I've heard of extreme examples where folks were forced at gunpoint by rebel groups to provide shelter. The previous rule considered this as giving 'material support' to a terrorist organization, even if it's done under duress.