There's always more that can be said on the topic, especially since the most recent answers are from a few years ago now, and both the state of scholarship and this subreddit's standards are under constant refinement. However, I think you'll get a pretty good picture from the following threads:
u/gingerkid1234 and our old pal u/[deleted] answer [What was the attitude of the Confederacy towards Jews?] (https://www.reddit.com/r/AskHistorians/comments/1v25n5/what_was_the_attitude_of_the_confederacy_towards/)
Another deleted user on how bad anti-semitism was in the American south, both before and after the war.
If you want a book recommendation, the gold standard work on the topic seems to be Robert Rosen's The Jewish Confederates. I have not read it myself and couldn't give you a review of it, but if it's good enough for u/[deleted], it's good enough for me.
To your second question, look no further than:
u/sunagainstgold's scintillating answer to this question on Billy Graham's anti-semitism...
Or, well, do look further. I'm not your mom. There's also three quite good answers in this older thread, which also gives you some reading recommendations and a somewhat more fleshed-out discussion, if that's what you're looking for.