The Nazis were a result of economic repression and social turmoils Germanic people. And, yeah, the Volkswagen was a good idea with good intentions, but we don't praise the Nazis for those vehicles or the idea that transportation should be more readily available.
It's really not much different when we read the OT and read of the genocide, rape, slavery, infanticide, and so many other atrocities found therein. Sure, it's mostly Mesopotamian and Babylonian anyways, and times were very different then, but we have no problems calling someone like Vlad The Impaler cruel and wicked because of his methods despite the circumstances surrounding his life (childhood to grave) and the bullies and invaders he was fighting against. There are times when it's kill or be killed. However, the Bible takes it so far as to even slaughter livestock, scorth the earth, and rape, pillage and plunder. It reads very much like ISIS storming through Iraq and Syria.
And that's only the beginning of moral objections towards the Bible. The ancient Hebrews did live in a very different world, but anything that has a law commanding rebellious children be killed is just not suitable for morality, especially to the degree that people take it literally. There is a reason some of the Abrahamic teachings and traditions are considered dangerous by some, and that is because some of them, when followed through, do pose bodily and mortal threats to others.
The subjugation of women is another very problematic thing. Especially in Christianity and Islam. But, according to the Bible, the OT permits fathers to sell their daughters into slavery. But Christianity has an enforced code of misogyny that heavily revolves around Paul. And Islam tends to have some appalling relationships with women, especially when we look upon Conservative and further denominations (though technically Christianity also has the command of women being very covered and sexless).