I think your observation,found in your second sentence,answers your question found in your first. Gibson probably sees clearly that normal people do not want to dwell on violence,thus the slippery slope.
Most people want to ignore the glorification of the body,the drugs and artificial substances used to mitigate or enhance natural state of man,the sickness and disease caused by indulging in one's own pursuit of all types of pleasure,the competition for winning at any cost,the misuse of others for personal gratification, the loss of respect for lives,murders that account for 20,000,or so deaths a year in this country,experimentation on some humans to enable some others to live on,abortions for specific reasons,abortions for convenience,killing one's own children and family,and on it goes.
In the past there was no means of condensing the tumble down the slope to extinction in a way that could show the watching public just what happened to other societies that started down the same slope. Now there is. It won't be every ones' cup of tea,but if it nudges a few people to get off their duffs and start taking positions that are not politically correct but instead just plain sound,then maybe we can turn the tide.
In Europe the Pope begs the EU to consider the roots of Western Civilization and acknowledge God and absolute Truth,he preaches to an anesthetized people, Mel is trying to do the same things with pictures. In other words to present a picture of a people who have developed a sophisticated,society without God and how it descends and is obliterated. I hope he succeeds in waking up a few more people.
In Europe the Pope begs the EU to consider the roots of Western Civilization and acknowledge God and absolute Truth,he preaches to an anesthetized people, Mel is trying to do the same things with pictures.
Mel doesn't like the Pope. He thinks any Pope since Vatican II is not legally holding the position, and is a false Pope. Mel, like his father before him, is virtually a schismatic from the Catholic Church. Read the history of his father (pull up Hutton Gibson on the Internet), and you will see what's going on here. Mel also believes his new movie is a portrayal of Bush and how he led us into war in Iraq. Mel thinks of himself as a pacifist while doing one movie after another that is all blood, all gore, all the time. Take your rose colored glasses off.