Complicated Answer: The Didact wants to imprison/compose/something-something to humanity because he sees them as a threat...or just hates them...the game doesn't make it clear.
Short Answer: He's insane (that isn't really speculation, he was kinda established as such in
Silentium)
Best Answer: Lazy writing. I mean, I can deal with the "antagonist wants to destroy/conquer everything because he's EEEVIL" plot device, but somehow they even managed to screw that up because the game doesn't even make it clear what the Didact wants to
do.
