Thats exactly what they want -- to either get rid of everybody or have everybody be completely unable.
Completely unable will work because the only thing they really fear is able people.
They have this overwhelming fear that they will perish if those around them become more able.
They're basically cowards hiding behind a facade.
They won't win.
Too many people around becoming more able and making them quiver.
They get desperate when the odds are against them.
The odds are against them and thats why all the desperate measures.