I haven't read transcripts of Billy Graham's discussions with Nixon concerning his feelings about Jews.
But some take offense to Graham's use of the phrase "synagogue of Satan" which comes from the Book of Revelation. I'd like to point out that this is a reference to people who put on an outward show, but their actions show who they really follow.
These days one might say a person who says one thing but under cover does something else is a member of the "church of Satan."