Two parts don't make a whole.
"Mean Mother" is actually two films in one. Infamously awful director Al Adamson once again took a foreign film and then shot some new footage to combine with it.

The old movie was an Italian film with a cast made up entirely of white people. Adamson decided to somehow make it into a blaxploitation/Vietnam Veteran film. One of the stars, "Clifton Brown", was in reality a somewhat popular recording artist at the time named Dobie Gray.

Anyway, the film is an unmitigated disaster. As you can imagine, the tone of the film is wildly uneven and the acting "talent" is undeniably bad. Why this was released on DVD is beyond me.

A cheap way to make movies.
This movie is a mixture of two different films and neither of them is any good. Klimovsky edited his 1970`s film El Hombre que Vino del Odio and merged it with a new film directed by Al Adamson which is filled with violence and nudity but not enough length to rate it as a feature film. So both directors try to seel us these separate stories as a brand new one but the lack of continuity makes evident this is not an original release. Mean Mother`s only attraction is the presence of Luciana Paluzzi who saves this boring picture in the few scenes she appears.