It wouldn't work over here

Below is one of my favorite commercials from when I was living in Japan.  It's a station bump for Space Shower TV, a music television station.  I love the idea and the execution, but it would never work in the States.  Even though it's promoting a message of peace, it is quite violent.  Strangely enough I think the peaceful bit at the end is what most would object to.  It seems like most American commercials only can focus on one thing.  It's either edgy or cute, never both.  It's a dancing baby or the apocalypse, but never a baby dancing in the apocalypse.  The question is, why?

DIRECTOR : 丹下　紘希（YELLOW BRAIN）
PRODUCER : 小島　章敬（SPACE SHOWER TV）
COMPOSITOR : 二階堂　正美（NTT MEDIA LAB）
ANIMATOR /CHARACTER DESIGN : 浦上　悠平（YELLOW BRAIN）
SOUND DESIGN : 久保田　敏之（NTT MEDIA LAB）
PRODUCTION COMPANY : YELLOW BRAIN Co.,Ltd.
TOOLS : AVID XPRESS PV、INFERNO、ADOBE AFTER EFFECTS 6.5