If you're referring only to the city limits of Birmingham, that might be partially true, but the metropolitan area is very much Dixie. Huntsville has long been home to many from all over because of Redstone Arsenal, and that area is probably less Dixie than most of the state. But the Birmingham area is Dixie, unless you think the fact it is a younger city disqualifies it.
I was going to qualify more about Birmingham but got lazy so late.
I drive thru it 4-5 times per year and just bought a car there from some southern speaking Maronite dealers
that stretch south of Birmingham is defintely Dixie..
Birmingham is like Tupelo...you’re right...kinda new