I am so, so sorry for you, and for your brother, and his sanity.
I never had an issue. Moved to the states in 92 and started a gaming group around people i met at church.
My current gaming groups includes one atheist, one deacon, one computer scientist who used to work in th church, an agnostic and a church-going couple.
i have no evidence that there is an relationship between belief and dislike for RPGs among the sort of mainstream Christians and other religious people I hang out with (our Jewish couple left for the east coast, and our Wiccan sort of faded out to be with a non-gaming partner).
Hey, now, the Lions had a winning season recently... what, 3 years ago? (Many of my kinfolk are in greater Detroit, and are Lions, Tigers, and Wings fans. I'm a wings fan... the rest... not so much).
I have noticed that pagans are far more prevalent in my local gamer crowd than the general population. As in, they represent less than 1% of the local population, but are in excess of 10% of the gamers I've asked about it. (sample size >50.) But the same is true also for the SCA, (and only about 30% of the SCA group locally are gamers). Agnostics and atheists are likewise disproportionately represented. It would make an interesting sociological study.
I've noticed that the loudest opponents of RPGs have been fundamentalist christian preachers, especially "independent baptists". My obnoxious coworkers who have been vocally opposed to RPGs have all been "independent baptists" as well.
Most recent local book burning was about the time of the release of BOVD, ca. 2002. It was almost entirely these same "independent baptist" churches involved. (FLGS owner on record as not being opposed to the burnings, because it's (1) free press for him, and (2) they're buying them from him.)
2nd Most recent local protest was same time, and was dispersed by the police when a couple rabidly vocal types from the protest laid hands upon a customer at the FLGS. Same people protested every Harry Potter novel, and every twilight novel.
There was a last gasp protest at the release of the 4E's BOVD, too. About 10 people showed up. Didn't even last the whole scheduled time.