Udo Ulfkotte was born into a Christian family, but he eventually became an atheist. While traveling among Muslims, he converted to Islam in Afghanistan. He is now a Christian, and is an outspoken critic of Islam.
Ulfkotte believes that Islamic culture cannot coexist with Western civilization, and that Muslims should return to Muslim countries. This is quite different from my view. I love seeing Muslims come to the West, because it gives us the opportunity to confront Islamic doctrine, and gives Muslims the freedom to choose whether they will follow Islam or something else (a freedom they do not always have in Muslim countries).
But Ulfkotte and I agree that something has to change. Ignoring the problematic commands in the Qur'an can only end in disaster.