Rather than simply looking at the particulars of how different groups of contemporary Christians act, you might find it useful to delve into the intellectual roots of Christianity.
Here is an excellent place to start:
Charles Freeman demonstrates that once the Christian Church became a Roman state religion it went about systematically dismantling Pagan science and philosophy. Its success led to the Dark Ages and such well-known crimes against humanity as the trial of Galileo.
To survive Chistianity must replace reason with faith. Otherwise, who would ever swallow that tale about Yahweh knocking up a Galilean peasant girl in order to sacrifice their offspring to save us from the sins of Adam and Eve?
PS: Europe is no longer Christian in any meaningful sense of the word.