There are far too many movies which fail to give us someone in the film to sympathize/empathize with, whether through ineptness on the part of the director & actors, or because the characters are so vile/empty/cardboard/venal/pointless/useless that one doesn't want to admit they are the same species as ourselves.
The only sympathetic characters for me in "Notte di Terrore" were the rats who, far from being menacing, were in fact huddled miserably together, busily trying to clean from themselves the black goop with which they had been coated in a clumsy attempt to make them look menacing. As for the human characters -- I simply could not wait for all of them to be dead! If these were the survivors who were supposed to repopulate the planet -- let the rats have the whole damn world.
Not only do the rats have to suffer being gooped up, they have the further indignity of being repeatedly tossed at bad actors. And Italian animal rights laws evidently being looser, many rats are obviously injured or killed for the sake of action effects, including several which are clearly burned alive. Would that they could have given their lives for a more worthy film.
I hope this movie isn't intercepted by some alien civilization out there, because it would serve to convince them of the need to exterminate the human race. For the good of the universe.