"We must secure the existence of our people and a future for White children"
Rick Stice, Luke's father, joined an obscure white supremacist cult. He opened his heart and his farm to his pastor, Michael Wayne Ryan. Soon, Michael's entire congregation lived there. But being the owner of the farm might make you a little uppity, and Ryan felt that needed to be put down before it started. First he made Rick a slave of the congregation. Then he made Rick entertain the congregation - and what Michael found most entertaining was making Rick hurt Luke. It started with beatings and whippings. Then Rick ran away... and made the mistake of coming back alone, instead of contacting law enforcement.
When he returned, Michael upgraded the 'entertainment'. Whippings weren't enough for him anymore. He continued to abuse Luke directly - but for the sodomy, he preferred forcing Rick to do it.
Luke's suffering finally came to an end when Michael threw him a little too hard, breaking his neck on a filing cabinet.
You will notice the dates on the gravestone. Luke never lived to see his sixth birthday.