About the Orthodox Jewish POV:
There are various opinions by stage of pregnancy. The first 40 days vs the first trimester vs the second vs viability vs before the head emerges vs after. Abortion is termed worse and worse as time goes on in the pregnancy. It may still be wrong in the first trimester though. It’s probably not considered murder by anyone until the fetus is viable. And in the first 40 days it may not even be a sin.
Different Talmudic scholars have different opinions and they represent various communities of very religious Jews. One, Rabbi Moshe Feinstein, had a strict view, that abortion is only permissible in cases where the mother’s life is in physical danger. (I don’t believe trimester is a consideration in this case.) Another, Rabbi Eliezer Waldenberg, had a more permissive view, that abortions are permitted even in the 2nd trimester if the fetus has Tay Sachs. I am not sure about the rationale, but it was probably out of concern for the mother’s mental health to give birth to a baby with such a terrible, uncurable, terminal disease. So basically, a generalization of the health of the mother. Or, another case would be a deformity that causes the fetus to suffer, in which case abortion would be allowed in the first trimester.
Both of the rabbis named above have many followers today.
I don’t think that highly religious Jews would consider abortion allowed for a reason dissimilar to the above. Whether or not it’s considered murder, it’s still probably considered a sin, unless something like the above applies.
The prime example in the Old Testament, other than the one you point out, is that if 2 men are in a fight and a pregnant woman gets injured, killing her baby, that is not murder.
Jews consider saving someone’s life to outweigh nearly anything else in the religion, so yes, if someone’s physical life is involved, then that would usually be the only consideration. There are 3 cardinal sins that are not outweighed, one of which is murder of another person. I think the other 2 are adultery and idolworship, but not sure.