Personally I find the notion that God creates people with particular unnatural inclinations in order to condemn them to hellfire a rather strange notion. I also think it's stretching it a bit to suggest that people aren't born with such a tendency and it is merely conditioning, though I do think if a person sincerely wanted to change then it could be possible, though not with the rather bizarre methods I've heard of certain "fundamentalist" Christians using, which apparently includes showing the person heterosexual pornography ("you can't cast out devils with devils") .
However the idea that some people have problems with their karma which lead them to continue doing things which are causes of further karmic problems, many of whom are unfortunately too deep in illusion to even realize that there is a problem with what they are doing, that makes sense to me. Of course, I don't believe they are going to suffer for it "eternally".