Not too mention he just couldn't get the job done either, he misses a lot with plasma casters and is actually responsible for a lot of bad things that happen. Earlier in the movie, the Aliens were confined or at the very least were content to stay in the sewers for the time being, until Wolf came along and released them into the public and caused an infestation, the black out tipped the odds against the humans even further.
Wolf created more mess than he cleaned.