One can say that a lot of Depalma’s “thrillers” border on comic. Carrie, Phantom of the Paradise, Dressed to Kill. You can’t tell someone what they did or didn’t find funny.
Just because somebody found something funny doesn’t mean it’s a comedy though. Funny you picked 3 of the movies I’d list as reasons not to be a DePalma fan, why he’s rather touch and go, sometimes great (Scarface, Carlitos Way) sometimes atrocious (Carrie and Phantom heading up that list, Dressed is middling in my book). I’d say Phantom is absolutely hilarious, just not in a good way, it’s funny like Ed Wood movies are funny.