Another hug out to you, Barb.
Sadly, I think you are right in believing things are not better. I also think family sex abuse is extremely underreported because of the family issues & shame that in itself causes. I don't mean to go where I shouldn't - but, if you haven't, maybe someday you & your brother can come to a place of peace (which does not mean to say acceptance of his abuse). His rationalization will be defensive but when/if you are ready - you'll know what to say.
And again you are so right - being a pedophile has nothing to do with one's sexual orientation (straight or gay) they are simply sexually attracted to children. I have not seen Foley using his being gay - but I have seen the newspapers somehow connect the two. (How typical). I have, however, seen that he does use sexual abuse as a reason & unfortunately, there is a pattern of the abused becoming abusers.