Well, Talking Points Memo has noticed the same thing:

The economy in Mississippi is different from those many other states that have recently addressed legislation impacting the LGBT community. The state, which has one of the lowest GDPs in the country, is not home to any Fortune 500 companies, lacks a significant tech sector, and has no major pro sports teams.

With relatively nascent LGBT movement, Mississippi was not ripe for the kind of backlash the country has seen recently in Georgia and North Carolina, where Atlanta and Charlotte house major national corporations, more established LGBT communities, and cosmopolitan attitudes. Mississippi has no major metropolitan area.

Jasmine Beach-Ferrara, the executive director of the Campaign for Southern Equality, a LGBT advocacy group that does work in Mississippi and North Carolina, told TPM that Mississippi lacks the “nexus where the corporate world meets the political world meets the cultural world” that exists in states like Georgia and North Carolina.

[…]

“The political climate in Mississippi remains quite conservative on the whole. We are seeing increasing levels of support for LGBT issues around the kitchen table and anecdotally in families, but when you look at, say the public discourse say around the Confederate flag issue, I think that’s a very accurate barometer of how conservative the rhetoric and discourse in the public square continues to be in Mississippi,” Beach-Ferrara told TPM.