They don’t now, but they certainly did in the past. Christian European countries conquered most of the world, and murdered a lot of people doing it. That doesn’t make them worse than others, because others conquered their neighbors when they could. They were just better at it.
And they were not true Judeo-Christians. Hitler was nowhere close to being Christian. If you hate Jews you hate Jesus.
By the way, Whoopie must hate God with a passion.
Christian European countries conquered most of the world, but only the Spanish and the Portuguese made much effort to bring people to Christianity.
In terms of "murdered a lot of people" -- remember that the majority of people killed in the Americas and Australia were due to diseases brought over inadvertently by the explorers