My Hands Came Away Red by Lisa McKay

This is a christian book about the strife between the Muslims and the Christians in Indonesia.
The main characters are as follow, with a bit of bio

Kyle- male, has a rap record
Cori-female, Australian
Drew-female, delicate temperament, bad personal history
Brenden- Male, Level headed
Elissa-female, peacemaker
Mark-male, family problems

Note: Some romance does occur in this book. Kyle and Cori are very close by the end of the book, same with Drew and Brenden.

These six teens are on a missions trip to build a church in Indonesia--a relatively safe task.
Thee they meet Daniel, his wife Mariati, and heir children, namely Manuel (Mani). The church is erected, the team gets along well, romance and personal history starts.
Then, when returning from a walk, the seven teens hear noises and hid in the bushes, crawling to get a better view. Muslim rbels are waiving machetes at Mani's parents. The teens watch in horror as Mani's parents are martyred, and their church burned.
Saving Mani's little sister from the torched outer buildings, the group runs for the mountains. Lead by Mani, the team starts hiking through the mountains to reach a neighboring town. Along the way, Mani goes into the towns posing as a Muslim to find out what is happening. A small war has broken out betwixt the Muslim and the Christians, many are dead, thousands wounded.
Across the mountains the team treks, encountering not only wild animals (Pythons, Wild boars), but crumbling moral. Drew starts "losing it" and Cori wonders about her family. More about Mark and Elissa is found out, his relationship with his parents virtually non-existent, Elissa planning to marry as soon as she turns 18.
Along the way to the town, the group encounters many Muslims that help them, the Muslims saying that the violence is not right. In the last part of their journey, the seven teens are trying to cross a extremely wide main road without being seen. All goes well until the sound of a car rumbles through the air. Cori, Mark and Elissa try to run off the road, shot ensue.
The Indonesian army picks them up, explaining the shots were a only warning. After quizzing them as to what they saw, they are taken to the embassy and flown to Jakarta and later to the U.S. to meet their parents. Mani has to stay behind, but does manage to get a letter to Cori, saying he is safe.
The story ends, the team back together doing an interview to spread the word about the war in Indonesia.

While the story is fiction, the back of the book explains all about the realness of the war in 1999 between the Christians and the Muslims. 5,000 to 10,000 people killed/murdered and 500,000 were forced to leave their homes behind to find safe places to take refuge.