There were plenty of Non-Jews who helped save jews . However it really wasnt so easy, so even if you were sympathetic it doesnt mean you could risk doing so. You could be sympathetic to the plight of a jew, but that doesnt mean you want your own children shot for helping (Yes this was a punishment for doing so)
Poles who were caught hiding jews were executed on the spot. Other non-jews who were caught hiding or helping jews were sent to a concentration camp.
Most of the people who survived did so because they had some help, Help could just be telling someone where there was a hiding place or giving someone some food