I don't feel there's a "genuine" anything if one bases it on what is known and what isn't. Take Strong atheists. They say they know, 100%, there is no god. What's their evidence? At the end of the day, a lot of facts and theories on many subjects but all resting upon one specific thing: their opinion. Same with theists (without the knowable facts); they believe it so strongly that there is a god no matter what anyone says. Dependent on the individual person. Some gods could be proven not to exist but never definitively because that's the power of the unknown, or the unknown at this time. However, if all it takes is one action to make someone deny one thing and accept another, one wonders where there mentality actually was from the beginning, no?