Obviously, the links between these two scenarios are weak, if not nonexistent. Perhaps this person is suggesting that legalizing the murder of the fetus will lead to future laws legalizing the murder of the sick and old, leading to legalizing the murder of anyone else incapable of taking care of himself. Most of us would be surprised if such inhumane laws ever became seriously considered by lawmakers. Legalized abortions have made the case for euthanasia stronger, but real change in society takes two to three generations to manifest itself. Laws as serious as these are never made arbitrarily.
People always have time to protest any new laws that seriously affect our lives.