Yes. I get it. But murdering Jews is neither morally nor ethically correct behavior. It was held as such by a group of sadly mistaken people and there's no evidence that this mistake was the result of defective DNA.
Whose morals?
In the 16th century it was morally acceptable to burn people at the stake for "witchcraft".
100 years ago it was morally acceptable for a noble English man to hunt aboriginees in Australia and collect a bounty for every ear he brought to the post office.
Less then 70 years ago it was morally acceptable for americans that an american citizen of african heritage was not allowed in certain restaurants.
Less than 20 years ago it was morally acceptable for a religious mob in Topeca Kansas to beat up people on the open street because they were gay, punks or simply different one way or the other.
You see morals are not universaly the same for everyone everywhere.
Ethics however are different. They are very universal for humans everywhere. They are much simpler, much less tangible set of behavioural rules that have been ingrained into our brains over millions of years of evolution. This is why it makes sense to look into the behavioural patterns of animals to understand human ethics.
There are some really simple things like the universal message of a kiss being friendly and loving or the staring at someone being hostile and threatening.
Take wolfs, e.g. They fight for hirarchy in the pack and those fights can be very violent, but there is the ethical (!) rule that if the inferior fighter admits defeat, rols on his back and exposes his throat to the superior, the superior will accept the defeat and will NOT kill the inferior of the two.
A superior fighter who kills the inferior anyway, will be expelled from the pack. He would be a danger to the survival of the group and has to go.
This is a genetically determined behavioral pattern. We humans do have simillar genetic behavioral patterns that are part of our nature. We despise those that violate these and will expell them from the society(the pack) by sending them to prison. Back in the days when humans were far and inbetween, violators were banned from the tribe.
Morals are what society builds on top of these basic ethics. These morals can be quite different from ethics and at times be unethical as well. This is because our brains have the capacity to overrule our genetically determined instinctual behaviours.