Name a group that has! Not even the Islamists have the "exact same mindset." If anything, the "mindset" of Christians is in more agreement than any other group because its based on the Bible. Sure there is disagreement in some interpretations, but the disagreements are on minutia. Most Bible knowing Christians - Catholics included - do not have disagreements on the major parts of the Bible. If they do, name the major disagreement of the Biblical text; I will gladly show you the non-Biblical and the Biblical difference.
Yes, I know, it’s not possible. That’s the way God made us.