Can one incorporate Catholic relics, statues, beliefs, without fully being Catholic and attending Mass and yet still be a Christian Witch?

I’m not Catholic, so it’s difficult for me to answer this, however, after studying Vodun/Voodoo (during my course of studying all those Witch books mentioned earlier), I did find out one thing: You CAN NOT be a Hougan, Borka, or Mamba (Vodun priests) if you ARE NOT Catholic, as Vodun is a branch of the [...]