Source: The Federalist After yet another bloody weekend, it’s time to speak frankly about who’s killing Christians and why  By Mollie Hemingway Wealthy Kenyans and Westerners bustled about Westgate Shopping Mall in Nairobi on Saturday. Families ate lunch in the food court. A radio station targeting Kenyan Asians was hosting a children’s event on the roof of the parking lot. Around noon, armed gunmen stormed the mall and exploded grenades. Thousands of terrified people dropped to the floor, fled out of exits and hid in stores. The gunmen began lining people up and shooting some of the five dozen people they…