Fundamentalist Christians can and do cause much harm- in so many ways.
In Africa some children are beaten and burnt for incarnating the devil- still today. Eritrea has a huge % (about 90%) of genital mutilation for girls- for Christians, not Muslims, and so on. And in may parts of the world, including the USA and increasingly in the UK, children have a very limited education via Creationism and the denial of principles of evolution, for instance. I had students from several brethrens where girls had to leave at 15 and have arranged weddings and were totally forbidden to study, or to have any kind decision in their lives- all were Christians. They had to wear long skirts, long socks and a scarf over their head. too.