Smart Patrol/Mr. DNA Lyrics

Lyric discussion by Dubious Merit 

Cover art for Smart Patrol/Mr. DNA lyrics by Devo

The "Smart Patrol" part is repetitive on purpose, I think; they're explaining themselves as the average above-average suburban kids; nothing special - so why are they the only ones noticing how the world's going to hell?

I'm confused about the "Mr. DNA" part, really. I get that there's a battle, but why are Devo/the Smart Patrol fighting him? Or are they fighting together?

Mr. DNA is "a man from the past" and "here to spread some genes" - could he be a post-evolution but pre-devolution human, at the prime of the species? But why is he a kamikaze, and why does he decide Devo should sacrifice themselves?

That being said, I really feel the scream of "This monkey wants a word with you!" at the end.