Check this link out:
http://www.psypost.org/2015/10/scientists-reduce-belief-in-god-by-shutting-down-the-brains-medial-frontal-cortex-38516
And this one:
http://www.wireheading.com/delgado/brainchips.pdf
Another link:
http://www.wnd.com/2015/10/scientists-we-can-mind-wipe-your-belief-in-god/
Some seemed to resist if one looked at the success rate