Abortion is more general whereas the Holocaust was specifically and systematic Anti Semitic. Abortion kills all kinds of human beings-- White, Jewish, Black, Hispanic, Asian, Native Americans, etc. The Holocaust was designed to murder over 6,000,000 Jews-- including un- and new-born Jews.
Man shot dead in northern Israel town of Bi'ina, police say the murder was gang related (Haaretz)
from the article: ADL slams movie that compares Holocaust to abortion