The Z-Man has some scary ideas.
Sometimes, there is a convergence between ideology and practicality. Importation of thuggish aliens to terrorize the non-compliant population might be such a case.
From the perspective of the Progressive Overlords (trademark pending), it's a Win-Win. They both burnish their compassionate credentials, and manage to use the 'undocumented Storm Troopers' to whip the unruly subjects into line with their agenda.