Thanks, I'll make a note to watch it.

There's an old one called 'It Happened Here', made in England in the early '60's. This is very good on the effects of  a messianic ideology at the level of the ordinary person.

The similarities between the political education classes, & satsang in the local communities, would make your hair stand on end.

These days it shouldn't be too difficult to track down a copy on DVD .