The documentary starts out well, touching on some important points such as political correctness favoring minorities. However, it then proceeds to blame other cultures for generic problems. It blames African and Jamaican cultures for violence, and frowns upon Middle Eastern and Indian immigrants (both called "Asian", for some reason) holding beliefs not consistent with Christianity.
It takes a "protect my rights and beliefs" stance over a "protect every-one's rights and beliefs" viewpoint. This can be seen by the producer's apparent belief that you shouldn't have the right to want a toilet facing away from Mecca, or a house that allows you to have a greater-than-usual number of children.
A Democratic or Republican government system will not protect individual rights without some assurance of unalienable rights of all people (like the US Bill or Rights used to be) AND a reasonably armed citizenry.
Educational vouchers or the dissolution of public education would address the inability of schools to teach many subjects in fear of lawsuits or cultural outrage.
Restoration of a British citizen's right to be armed and defend themselves would reduce (not eliminate) almost all crime, especially gang-related crime.
Equal use of law-enforcement regardless of race, religion, or gender would stem cultural violence and reduce religion-based child (and adult) abuse, which, as the video failed to recognize, has been committed by every race, and justified by essentially every religion.