The enemy is the same ignorance and hate that leads to transphobia, racism and misogyny. It's the same ignorance that causes us to jump to defend our mistakes, rather than attempt to understand why or how we could be wrong. It's the same hate that drives people to inexplicably murder another person they deem as other, or wrong, or perverted, or less-than.
We're living in historic times, as far as LGBTQ issues and rights go. It thrills me to see the arc of the moral universe bending toward justice. Slowly, but surely, I think we're getting to a world that is more loving and accepting of the widely and wildly diverse examples of the human experience. And I think brave people like Caitlyn Jenner are helping us get there.