So why wasn't the bombing of a school in Michigan that killed 45 people in 1927 (by a local nutcase upset with high school taxes) the "commencement of the beginning of the start of the warm-up coming down the pike?"
Actually, it was. So were the Birmingham church bombings. The Spanish inquisition. The 6-day war. The hundred-day-war. The holocaust. These events were set in motion the moment Adam ate of the fruit. Since then, we've been killing, robbing, lying to and cheating each other. We just can't help ourselves
The Father gave us a lifeline by sending His son, the Christ. But to this day most just ignore Him, or follow Him in name only. So, expect these sort of things to happen until time runs out.