Thinking for a moment about your topic, and how one would present it,
It's hard to sell viewers on looking something horrific in the face directly, but that doesn't mean it can't be done.
Here's my quick take. Schindler's list was a film that helped raise awareness about the horrific plight of the Jewish people during the Holocaust. People loved it, and it's considered one of the finest films of all time. The thing is, Spielberg didn't make a movie about the gas chamber, he made an inspiring story about a hero that defined personal courage in the face of danger. It was about fighting back against the system when the system becomes evil. It was about hope, and how it can exist in the darkest of times. The film did show the horrors of the camps, the tragedy and sorrow of what happened, and it did so front and center, but audiences left the theater with the right message.
The message wasn't "look how horrible the Holocaust was", it was "good people can still stand up for what's right". He needed to get those Holocaust scenes on film, and make sure people never forgot that horror, but he also understood how important it was to provide people with a way forward, a vision not only of evil, but of how we each have the power to stand up against it. The film closed with a message about how incredibly effective one person fighting against tyranny actually was.
I haven't read your script, maybe that's already exactly what it is, I'm just offering a thought on a time I saw someone really nail this difficult task of getting audiences to really love a film about a very uncomfortable and sad topic.