Mind you I'm an atheist, albeit with an amateur interest in biblical scholarship and archaeology. I just find that period interesting. And I think there is plenty of bad things Jesus actually said or did to point to. But I do believe the most egregious moral flaws of the New Testament are in the epistles, not the the gospels.
Yes, the scriptures include things that are problematic, especially in the context of today's mores. But in so many cases, understanding the norms of the times really helps understand the "why", which is important.
In the case of Abraham Lincoln, he deserves credit for being progressive for his time in his pursuit of abolition. Does that mean we should follow his views on the inequality of white and black people, because he was progressive then? No, we've come a long way since then.
For Lincoln, celebrate his accomplishments and how he helped us progress. For the difficult things, understand they are artifacts of his time. They are important to understanding him and can further help color who he was.
Reasonable Christians do the same with the Bible.
If we're meant to update for modern morality maybe we need a Newer Testament. Until then, the ambiguity of the words of long dead shepherds leave quite a lot to be misinterpreted, as well-intentioned your interpretation may be.
Your interpretation is well and dandy but perhaps as a society we need to stop holding text that's so dated in such high regard, where many peoples interpretation is far less optimistic and charitable than yours.