"Murder is bad" is not as sacrosanct an idea as it should be. In fact, historically, it was quite the opposite. Just look at the US's traditionally sadistic murders in the name of justice, from old lynchings to the new cross-mounted "lethal injections". Even the naming is so... Out of touch.

You'd think the cross at least would raise some eyebrows in the relevant religious community, but you'd be wrong.

There's so many superstitions and beliefs that once had a purpose, but now do not, other than holding society back.

Koreans still think a fan will kill them, Europeans still think colonization was actually good for the colonized, and the USians still think their country is the absolutely first and best in the world, or at the veary least a 1st world nation in the development sense.

In most places, "traditionalists" claim any raped woman wasn't actually raped, because all of them must have worn miniskrits, looked at the man seductively and secretly wanted it. In fact, she should be the one punished for raping him! And it's always a him and her. The rest should naturally get the lethal injection treatment.

What old beliefs tend to be is held by people with a lack of critical thinking skills. Which means a bunch of it is superstitious bullshit that has little more than a tangential basis in reality. Moreover, their critical thinking skills tend to make those beliefs skew just the right way to be as disjunct from real life and as senseleness as possible even when the tangential relation with history is plainly visible.