The Sons of Confederate Veterans say they will permanently install a giant Confederate flag near the junction of Interstates 4 and 75 to counter what they consider increasing slights to Southern heritage. But the group, founded 112 years ago to protect all that is noble about the South, is itself racked by angry divisions. Since the 1990s, clusters of Sons members have aligned themselves with "heritage groups" like the League of the South and the Council of Conservative Citizens, both considered hate groups by the Southern Poverty Law Center. The law center says the Sons may have been taken over...