Maimonides was court physician to the court of Saladin and not only treated these numerous Muslims but he even wrote several treatises for them in Arabic. You probably mean a Jewish physician should not desecrate the Sabbath if there is another doctor who can treat the patient. Not rescuing a Gentile from a river is non-sense as it states clearly in the Torah there should be one Law in the Land, all mankind are in G-d's Image, 'Love thy neighbour as thyself, Do not do until others as you would not have them do unto you etc etc.
Israel passes law sanctioning force-feeding prisoners (Haaretz)
from the article: Police release rabbi arrested for inciting to kill non-Jews