What Bill Maher, Sam Harris and many others like them fail to realize is that religion as it is practiced is a product of a wide array of factors, the official texts being only one of them. People of any faith are more shaped by the norms of their cultural context, interpreting their religious texts to comport with those norms rather than the other way around.
Many people seem fixated on the fact that the actual cause of homosexuality has not yet been established with any degree of certainty. As someone who likes to understand the reasons things occur, I respect and appreciate the curiosity. However, the ultimate result remains the same, regardless of whether the cause is genetic, environmental, or some combination of the two.
If transgender people want to be respected and accepted for who they are, then the same courtesy must be extended to cisgender men. One's sexual gender preference deserves as much respect and acceptance as one's gender identity. This realization helped me come to terms with my general lack of attraction for trans women.