That THEY were shocked is saying something ... coming from Europeans THEMSELVES survivors of decades of internecine, abjectly bloodthirsty religious wars and wars of succession.
Bloodthirsty religious war is a leftist fantasy. The evolutionary purpose of religion is it helps a tribe win at warfare, especially if it is a superior religion. Envy is the root cause of tribal warfare. Leftists are driven by envy so they can’t handle envy being the problem so they blame the solution.