I would argue that yes, it kinda is awful. He's not asking permission to use a bunch of condemned criminals or whatever, and he's not asking if the people he's saving are ok with that either. He's trying to basically solve his own problems by murdering a bunch of people who aren't involved.
There may be more acceptable variations of the same rough idea, but as presented King Radical is essentially still the bad guy here.
Remember, the person totally ok with this is Hortense, and remember she's an unscrupulous contract killer working for Doc's enemy.