Its a Troma film...that explains a lot.
And the cheese rolls ever onward, Andrew...how do you do it?
I don't know of any Troma connection with this one. It does have a convoluted pedigree, which is why there are three versions:
Dark Night
Dying Day
Raiders of the Living Dead
The film was apparently edited each time, with newly shot material added each time, until we finally got to "Raiders of the Living Dead" - a much different movie than the original script.