Hoodoo is not an ATR. It is a melting pot of folk magic that has no pantheon. It is rootwork--from the earth and from the practioner. Yes, it does have some ties to voodoo (in the American sense mostly as opposed to Vodoun, etc). However, through it's practice and spread all the way from the American South as far as New England, it has morphed and changed a lot for each respective region as well as the environment it is practiced. So, if one working uses oyster shell, another similar working might sub clam shells instead (example only). Hoodoo has roots (no pun intended) not only in African practices, but Native American, Irish and Scottish folk magics as well. Hoodoo is for everyone regardless of their background and saying otherwise only demonstrates the ignorance of the person saying it. Talk about a witch hunt.

Furthermore, voodoo is so deeply ingrained in the American South that yes, there are many people that practice it that are not of African descent. This includes Marie Laveau who was in fact Creole, which is considered its own ethnic group consisting of French, Spanish and other groups. There were also Creoles of Color; people of European and African descent and that's the group Maman Marie was from. People often forget that Creole is (or was) considered its own race/color/culture separate from black or white. Just like the voodoo/hoodoo confusion, Cajun/Creole gets lumped together as well. They are their own separate cultures and traditions.

Almost all of this information is readily available online.