Bombs going off in the Middle East is a daily occurrence. It almost never happens here. That's part of the difference.
The other difference is that the bombs went off mere blocks from several of the best hospitals in the world, and that medical personal and emergency vehicles were on sight when it occurred. That's why there's an injured toll well over 100 and a death toll of 3 - many of the 100+ would have died had the circumstances been otherwise, but as they were, they received immediate care, which is the most important thing in saving lives. It's why we have battlefield doctors - they significantly reduce mortality rates on the field of combat.
Having said all that, I don't feel this news item deserves as much attention as its getting, and I'm wondering if we're giving the terrorists the win on it. They only win if we're scared.
I see no problem with Funny or Die delaying this.