Agreed. As long as one respects others’ God given rights, then one’s personal feelings and biases are fine. When somebody tries to infringe upon God given rights based on their biases (gay “marriage”, mandatory birth control coverage, infanticide) then that’s another story. Atticus, based on how he was written in TKAM, was conservative.
It actually elevates Atticus’ moral stature, that he would risk social ignominy and hostility to defend a Negro defendant because he considered it the right thing to do, despite what he may have thought of the man’s race. If one reads the prequel first, one would be inclined to think even more highly of Mr. Finch, as a man who rises above his own prejudices. The book is only a prequel in the sense of published-after, it was actually written first. Atticus already existed and was fully formed in the author’s mind before TKAM.