Have you forgotten what 2,000 years of Christian love looked like in Europe, with all the wars, pogroms, inquisitions, genocides, slave trading, and the decimation of native tribes throughout the New World and tribal Africa. All the conquers that came to the New World and Africa were flying the flags of Christian Kings with the blessings of the Church.
As for murdering communists, that was also done by those promoting religion. I remember when I was fighting in Vietnam and we were killing people in their own Country, abusing prisoners, and defoliating their jungles and crops with cancer causing agents, and clerics came to field to bless us for killing these so-called godless communists. They made me sick.
My combat unit received Presidential Citation Award for being in 13 major battles in a two month period. So I know that history a little better than what you read in a book.