Not. Overt American intervention would make the US the issue. If they martyr the protesters, all hell will bust loose.
They will be patriots. Natan Hale's spirit lives on; "I regret that I have but one life to give for my country."
There is NO reason for "overt American intervention."
The CIA can very easily smuggle in a few hundred (to start with) pistols and rifles of the exact same type used by the Iranian police and military.
No American fingerprints on "liberated" Iranian weapons.