That newborn alien thing was disgusting to me as a kid and me now. That whole death serene is gross to me and honestly the whole movie was disgusting to me tbh.
I think we were supposed to feel sympathy for the Jolly Roger because it was part human? Kill that thing with fire. No mercy.
What a bonehead idea anyway. Take this horrible species and cross it with humans, the most unpleasant, violent, destructive species in this quadrant of the galaxy? Good job. It would be like us crossing a honey badger with a great white.