Early modern humans experienced thoughts as commands from external "gods"

Title should begin with "Maybe".

Julian Jaynes proposed this as a hypothesis.

Sonic weapon: See also https://en.wikipedia.org/wiki/Sonic_weapon#See_also

Microwave auditory effect https://en.wikipedia.org/wiki/Microwave_auditory_effect

There was "psychoenergetics" research in the USSR in the 1980s at least.

"neurophone" https://www.google.com/search?q=%22neurophone%22

TMK there are no known programs of countermeasure for "MK" or BCI abuse or "neroassault"

There are "neuro ethics" laws in some places.

Neuroethics: https://www.google.com/search?q=neuro+ethics

How can evidence of RF or EMF harassment be admitted in legal proceedings?

How can evidence of RF or EMF harassment be reviewed by judges and juries per due process?

(Due process includes equal protection of equal rights.)

Shouldn't it be a crime to transmit a voice or voices into a person's head to manipulate them [about or using religion or God], if they have not consented?

Was Joan of Arc acting morally in killing without due process, because God said to do it?

if you are interested in such theories, you might also enjoy Bruno Snell's The Discovery of the Mind.