I commend you for writing this, but there's a few assumptions that bothered me:
"WHILE THE WORLD STOOD BY SIX MILLION DIED" The world didn't "stand by" -they went to war (in 1939 in Canada's case)
My father had his tank blown up 3 times crossing Europe-hardly standing by...
"THE SCREAMS OF PEOPLE FALL ON DEAF EARS"-see above
"NOBODY WANTS TO LOOK"- not in my experience. History channel, PBS, etc constantly air shows on the topic.
"FUTURE PEOPLE WON'T BELIEVE IT
IF THEY JUST READ IT IN A BOOK" Really? Not in my estimation.
As for "Never again" I didn't hear a great uproar from the world condemning genocide in Africa and other countries.
Again, I commend you for the topic but the lyric needs some work.

P.S. All caps can be hard on the eyes! smile